Answer:
Pressure reversal
Explanation:
heat transferred into the system is equal to the work done on the system by the surroundings. If we plot an isothermal process on the xy plane, we see that as the pressure increases, the volume will decrease and as the pressure decreases, the volume will increase.
which of the following statements regarding this reaction is true? 1. the hydrocarbon is used in excess. 2. stoichiometry does not matter in this experiment since we are only interested in the rate of the reaction. 3. equimolar quantities of bromine and the hydrocarbon are used. 4. bromine is used in excess.
Statement 3, which claims that equimolar amounts of bromine and the hydrocarbon are employed, is the only one that can be evaluated to be true or untrue based on the information provided.
A type of organic substances known as hydrocarbons is made up of carbon and hydrogen atoms. They are the most basic kind of organic chemicals and are present in both natural and artificial sources, such as plant oils, natural gas, and fossil fuels. Alkanes, alkenes, alkynes, and aromatic hydrocarbons are some of the several structural subgroups that can be categorised according to their physical and chemical characteristics. Many crucial chemicals and goods, including plastics, detergents, and medications, are produced using hydrocarbons as fuels, solvents, lubricants, and raw ingredients. Their use, however, can also result in environmental issues including air pollution and climate change.
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Which statement among the given statements about a chemical reaction involving bromine and a hydrocarbon can be evaluated as true or false based on the information provided, and why are the other statements not able to be evaluated in the same way?
The Arrhenius equation is k = Ae^-E_a/RT. The slope of a plot of lnk vs. 1/T is equal to -k k E_a -Ea/R A When the concentrations of reactant molecules are increased, the rate of reaction increases. The best explanation for this phenomenon is that as the reactant concentration increases, the average kinetic energy of molecules increases. the frequency of molecular collisions increases. the rate constant increases. the activation energy increases. the order of reaction increases.
A plot of lnk vs. 1/T has a slope of -k k E a -Ea/R A. The pace of reaction increases as the concentrations of reactant molecules rise. The average kinetic energy of molecules increases as the reactant concentration rises, which is the best explanation for this occurrence.
what is concentration?Concentration in chemistry is calculated by dividing a constituent's abundance by the mixture's total volume. Mass concentration, molar concentration, number concentration, and volume concentration are four different categories of mathematical description.
what is a molecule?According to the context, the term may or may not include ions that meet this requirement. A molecule is a collection of two or more atoms held together by attractive forces known as chemical bonds.
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What is the area of science that studies tiny particles like atoms?
Answer: Chemistry (mainly)
Explanation:
if you mean studying atoms, then yes, chemistry.
Calculate the number of moles of Au atoms present in 1 gram of gold. How many atoms of Au are there in one gram? How many moles of protons? How many protons?
Help me (T__T)
0.03058 X 10^23 atoms of Au are there in one gram gold.
How many moles of atoms make up a gram?
The quantity of atoms or molecules per gram of atomic weight is known as Avogadro's number, which is 6.022 1023/mole. One mole of hydrogen comprises 6.022 1023 hydrogen atoms for one gram of hydrogen with an atomic weight of one gram.
The ratio of a substance's given mass in a chemical reaction to the mass of one mole of that material is the number of moles of that substance.
Gold's atomic weight (Au) is 196.97.
The Avogadro number is 6.023 x 10^23.
1 gram of gold is equal to (1/196.97)mole, or 0.005 mole.
3.058 X 1021 (0.005 mol X 6.023 X 10^23) = 0.03058 X 10^23 atoms.
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calculate the molality of a solution that contains 2.33 g carvone in 17.6 ml of ethanol (density 0.7893 g/ml). assume that carvone is nonvolatile at the normal boiling point of ethanol and that it is a nonelectrolyte.
The molality of a solution that contains 2.33 g carvone in 17.6 ml of ethanol , the density is 0.7893 g/ml is 1.12 molal.
Mass of carvone = 2.33 grams
Volume of ethanol = 17.6 mL
Density of ethanol = 0.789 g/mL
Molar mass carvone = 150.22 g/mol
Moles carvone = mass carvone / molar mass carvone
Moles carvone = 2.33 grams / 150.22 g/mol
Moles carvone = 0.0155 mol
Mass ethanol = density × volume
Mass ethanol = 0.7893 g/mL × 17.6 mL
Mass ethanol = 13.89 grams = 0.0138 kg
Molality = moles carvone / mass ethanol
Molality = 0.0155 / 0.0138
= 1.12 molal
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what is the percent abundance (in units of percent) of zinc in a sample whose density is 7.796 g/ml and the only other component is copper? the density for pure copper is 8.96 g/cm3 and the density of pure zinc is 7.13 g/cm3. report your answer to one decimal place.
The percent abundance of zinc is approximately 73.8%, a sample whose density is 7.796 g/ml and the density for pure copper is 8.96 g/cm3 and the density of pure zinc is 7.13 g/cm3.
What do you mean by the density ?The term density is defined as the measurement of how tightly a material is packed together.
It is also defined as the mass per unit volume.
Formula: ρ = m/V,
where ρ is the density, m is the mass of the object and V is the volume of the object.
Density of mixture = (density of copper)(percent abundance of copper) + (density of zinc)(percent abundance of zinc)
Now, Converting the densities to consistent units, we have:
density of mixture
= (8.96 g/cm³)(0.01)(100 - x) + (7.13 g/cm³)(0.01)(x)
By simplifying and converting to g/mL, we get:
density of mixture = 0.0896 g/mL (100 - x) + 0.0713 g/mL (x)
density of mixture = 0.0896 g/mL (100) - 0.0896 g/mL (x) + 0.0713 g/mL (x)
density of mixture = 8.96 g/mL - 0.0183 g/mL (x)
Then, we can use the given density of the mixture (7.13 g/mL) to solve for x:
7.13 g/mL = 8.96 g/mL - 0.0183 g/mL (x)
0.0183 g/mL (x) = 1.35 g/mL
x = 73.8
Thus, the percent abundance of zinc is approximately 73.8%.
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Transcribed image text: Select the keyword or phrase that will best complete each sentence. Select the keyword or phrase that will best complete each sentence. A tetrahedral carbon is____hybridized while a linear carbon is_____hybridized. Two different compounds that have the same molecular formula are known as_______. Pi (pi) bonds are generally____than sigma (sigma) bonds. Hybridization is the combination of two or more______orbitals to form the same number of____orbitals, each having the same shape and energy. A_____bond is formed by side-by-side overlap of two p orbitals. The____is a measure of an atom's attraction for electrons in a bond and indicates how much a particular atom ''wants" electrons. Two Lewis structures that have the same atomic placement and a structure but a different arrangement of pi electrons are called_____. All single bonds are_____bonds.
The answer for the blanks are: sp3, sp, isomers, weaker, atomic, hybrid, pi, electronegativity, resonance structures, sigma (in the sequence of the blanks)
A tetrahedral carbon is sp3 hybridized while a linear carbon is sp hybridized. Two different compounds that have the same molecular formula are known as isomers. Pi (pi) bonds are generally weaker than sigma (sigma) bonds. Hybridization is the combination of two or more atomic orbitals to form the same number of hybrid orbitals, each having the same shape and energy. A pi bond is formed by side-by-side overlap of two p orbitals. The electronegativity is a measure of an atom's attraction for electrons in a bond and indicates how much a particular atom ''wants" electrons. Two Lewis structures that have the same atomic placement and a structure but a different arrangement of pi electrons are called resonance structures. All single bonds are sigma bonds.
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Which mass of Carbon id produced?
Answer:
(c) 4.4g
Explanation:
Given:
mass of calcium carbonate (mCaCO3) = 10g
MrCaCO3 = 100
To find: mCO2
Solution:
CaCO3 + 2HCl → CaCl 2 + H2O + CO2
Now,
MrCaCO3 = 40 + 12 + 16.3 = 100
Therefore,
Number of moles (n) = m/Mr
nCaCO3 = 10/100 = 0.1
The amount of moles is proportional to the coefficient of the reaction. Since both calcium carbonate (CaCO3) and carbon dioxide (CO2) have the same coefficient.
nCO2 = 0.1
MrCO2 = 12 + 16.2 = 44
mCO2 = 0.1 × 44 = 4.4g
What is the mole ratio for hydrochloric acid and chlorine?
2MnO2 + 4HCl → 2MnCl2 + 2H2O + 2Cl2
Answer:
4:2 (2:1 simplified)
Explanation:
Check the coefficients!
What is the product of benzoic acid with sodium hydroxide?
Sodium benzoate is the product from the reaction of benzoic acid with sodium hydroxide.
A chemical reaction is defined as a process in which one or more substances, also called reactants, are converted to one or more different substances, known as products.
When NaOH is added to benzoic acid it neutralizes the benzoic acid producing the benzoate ion, which now goes into the aqueous layer, leaving other other two organic compounds in the ether. Similarly, it can be observed that nitroaniline that is not soluble in neutral or basic conditions, but is soluble in acidic type solutions.
The balanced chemical reaction is given as,
C₆H₅COOH(s) + NaOH(aq) → C₆H₅COO⁻Na⁺(aq) + H₂O(l)
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a student was asked to determine the concentration of ammonia, a volatile substance, in a commercially available cloudy ammonia solution used for cleaning. first, the student pipetted 25.00ml of the cloudy ammonia solution into a 250.0 ml conical flask. 50.00 ml of 0.100 m hcl(aq) was immediately added to the conical flask which reacted with the ammonia in solution. the excess (unreacted) hcl was then titrated with 0.050 m na2co3(aq). 21.50ml of na2co3(aq) was required. calculate the concentration of the ammonia in the cloudy ammonia solution.
Based on the provided data, the concentration of ammonia in the cloudy ammonia solution is 0.200 M.
Calculation of Concentration of Ammonia in a Cloudy Ammonia SolutionThe balanced chemical equation for the reaction between ammonia and hydrochloric acid is:
NH3(aq) + HCl(aq) → NH4Cl(aq)
From the equation, we see that one mole of ammonia reacts with one mole of hydrochloric acid to produce one mole of ammonium chloride.
To determine the concentration of ammonia in the cloudy ammonia solution, we need to find out how many moles of hydrochloric acid were used to react with the ammonia.
The number of moles of HCl used is:
moles of HCl = concentration of HCl × volume of HCl used
moles of HCl = 0.100 mol/L × 0.0500 L
moles of HCl = 0.00500 mol
Since the reaction is 1:1 between HCl and NH3, the number of moles of NH3 in the cloudy ammonia solution is also 0.00500 mol.
The volume of the cloudy ammonia solution used is 25.00 mL, which is equivalent to 0.02500 L.
The concentration of ammonia in the cloudy ammonia solution is:
concentration of NH3 = moles of NH3 / volume of cloudy ammonia solution
concentration of NH3 = 0.00500 mol / 0.02500 L
concentration of NH3 = 0.200 mol/L or 0.200 M
Therefore, the concentration of ammonia in the cloudy ammonia solution is 0.200 M.
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Look at the diagram shown below. Could this equipment be used to find out how much energy a fuel
gives out when it burns?
no
yes
Thermometer
Container
B
Lid
Mixed chemicals
Answer: Yes
Explanation:
Answer:
YESS
Explanation:
This equipment could be used to find out how much energy a fuel gives out when it burns. By measuring the temperature change in the container, the energy released by the combustion reaction can be calculated. The thermometer measures the temperature change and the container is used to hold the mixed chemicals (fuel and oxidizer). The lid is used to prevent the loss of heat and to create a closed system for the reaction to take place.
ALLEN
in the first 13.0 s of the reaction, 0.018 mol of o2 is produced in a reaction vessel with a volume of 0.380 l . what is the average rate of the reaction during this time interval?
The average rate of the reaction during the first 13.0 seconds is 0.00523 liters per second. The average rate of a reaction is a useful concept in chemical kinetics that allows us to study the rates of chemical reactions and the factors that affect these rates.
The average rate of the reaction during the first 13.0 seconds can be calculated as follows:
First, convert the amount of O2 produced from moles to liters using the volume of the reaction vessel:
0.018 mol x (0.380 L/1 mol) = 0.0684 L
Then, divide the volume of O2 produced by the time interval to obtain the average rate of the reaction:
0.0684 L / 13.0 s = 0.00523 L/s
So the average rate of the reaction during the first 13.0 seconds is 0.00523 liters per second.
The average rate of a reaction during a certain time interval is a measure of the change in the concentration of a reactant or product over that time interval. It is a useful concept in chemical kinetics, which is the study of the rates of chemical reactions and the factors that affect these rates.
In general, the average rate of a reaction can be calculated as the change in the concentration of a reactant or product over a given time interval, divided by the time interval. In this case, the average rate of the reaction was calculated as the change in the volume of O2 produced over a 13.0 second time interval, divided by the time interval.
The average rate of a reaction can be used to determine the overall rate of a reaction, as well as to study how the rate of a reaction changes over time. By measuring the average rate of a reaction at different points in time, it is possible to study the rate-determining step of a reaction and to determine the order of a reaction with respect to each reactant.
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If 20cm^3 of potassium chloride was titrated with 60cm^3of 0.105M silver nitrate solution,calculate the molarity of potassium chloride solution
According to molar concentration, the molarity of potassium chloride solution is 0.315 M.
What is molar concentration?Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.
The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.
In case of 2 solutions, it is calculated as, M₁V₁=M₂V₂ which on substitution gives M₁=0.105×60/20=0.315 M.
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Which table shows a proportional relationship between x and y? Responses x 2 4 7 8 y 6 10 21 24x 2 4 7 8 y 6 10 21 24 , x 4 7 8 10 y 2 3. 5 4 5x 4 7 8 10 y 2 3. 5 4 5 , x 40 50 60 90 y 8 10 14 18x 40 50 60 90 y 8 10 14 18 , x 1 2 3 4 y 6 8 10 12x 1 2 3 4 y 6 8 10 12 ,
The table that shows a proportional relationship is given as follows:
x: 4 7 8 10
y: 2 3.5 4 5
Proportional Relationship:
A proportional relationship is a relationship between two variables with equal proportions. Another way to think about them is that in a proportional relationship, one variable is always a constant value multiplied by another variable. This constant is known as the "proportional constant".
Direct Proportional Relationship:
This type describes a direct relationship between two quantities. Simply put, when one value increases, the other value also increases and vice versa.
For example, when a car speeds up, it travels a longer distance in a given amount of time. In notation, a direct proportion is denoted by y ∝ x.
Inverse Proportional:
This type describes an indirect relationship between two quantities.
Simply put, when one value increases, the other value decreases and vice versa y ∝ 1/x. For example, by increasing the speed of a car, it can travel a fixed distance in less time.
Based on the Question:
For proportional ratios, the ratio between the output and input variables must be constant for all values in the table, so the correct option is given in the third table as
2/4 = 0.5.
3.5/7 = 0.5.
4/8 = 0.5.
5/10 = 0.5.
and the ratio equation: y = 0 and 5 times.
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why does each element have its own unique atomic line spectrum?
Each element has its own unique atomic line spectrum because the spectral lines are related to the energy levels of electrons in the atom.
When an electron in an atom gains energy, it jumps to a higher energy level. When it falls back down to a lower energy level, it releases the excess energy in the form of a photon of light. The energy of the photon corresponds to the energy difference between the two levels. Since each element has a unique arrangement of electrons and energy levels, the energy of the photons released by each element is also unique. These photons create a specific pattern of spectral lines that can be used to identify the element.
The spectral lines are also affected by the presence of other atoms or molecules in the environment. This is why the spectra of elements in a gas, liquid, or solid state can be different. Additionally, the spectral lines can be broadened or split due to various factors, such as magnetic fields or temperature.
The study of atomic line spectra is an important field of spectroscopy, which has many practical applications in fields such as chemistry, physics, astronomy, and materials science.
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in any organic redox reaction, you can recognize the reduced and oxidized organic molecules by tracking the charges between products and reactants. reduction corresponds to an increased charge . oxidation corresponds to
Reduction corresponds to an increased charge, while oxidation corresponds to a decreased charge.
Reduction involves a decrease in oxidation number and an increase in charge. On the contrary, oxidation of a compound or an element in a reaction involves increase in oxidation number and a decrease in overall charge.
Reduction is a process in which hydrogen ions are added to the reactant, while oxidation experiences a loss of hydrogen ions. Another aspect of redox reactions involves addition of electrons in reduction, while loss of electrons in oxidation. Redox reactions are the chemical reactions in which there is a chemical change in the substrate or the reactants. Where reduction stores energy, oxidation releases it.
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what is the total enthalpy change (in kj/mol) for the dissociation of a mole of hydrogen gas at stp?
the total enthalpy change for the dissociation of a mole of hydrogen gas at STP is 872 kJ/mol.
The dissociation of hydrogen gas (H2) into individual hydrogen atoms (2H) can be represented by the following chemical equation:
H2(g) → 2H(g)
The standard enthalpy change of this reaction is given by the bond dissociation energy of the H-H bond in H2, which is 436 kJ/mol. Since two H-H bonds are broken in the dissociation of one mole of H2, the total enthalpy change for the reaction is:
2 × 436 kJ/mol = 872 kJ/mol
Therefore, the total enthalpy change for the dissociation of a mole of hydrogen gas at STP is 872 kJ/mol.
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where are voltage-gated sodium and potassium channels generally found in neurons?
Voltage-gated sodium and potassium channels are generally found in neurons the axon origin of spinal cord.
All cells have an electrical implicit difference, or membrane eventuality, across tube membrane. the electrical implicit difference across tube membrane is a function of ions attention in the intracellular and extracellular results and of the picky permeabilities of ions.
In general, voltage-gated sodium( Nav) and voltage-gated potassium( Kv1 and KCNQ) channels are located in the axon, and Kv2, Kv4, and hyperpolarization- actuated cyclic nucleotide-gated channels( HCNs) are located in the dendrites. There are exceptions; for illustration, different types of voltage-gated calcium( Cav) channels and Kv3 channels are distributed in the axon and dendrites.
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a compound, naclox, where x is unknown, was found experimentally to contain 29.0 % of chlorine by mass. what is the value of x?
x is 1. Sodium chloride (NaCl) is a binary ionic compound composed of sodium (Na) cations and chloride (Cl) anions.
The empirical formula for sodium chloride is NaCl, which means that each formula unit of sodium chloride contains one sodium cation (Na+) and one chloride anion (Cl-).
Since the compound was found to contain 29.0% of chlorine by mass, the molar mass of the compound can be determined as follows:
Mass of Cl = 29.0 g Cl / 100 g compound
Mass of Na = 71.0 g compound - 29.0 g Cl
Moles of Cl = Mass of Cl / Atomic mass of Cl
Moles of Na = Mass of Na / Atomic mass of Na
Since the ratio of sodium cations to chloride anions is 1:1, the number of moles of sodium cations is equal to the number of moles of chloride anions. The empirical formula for the compound is therefore NaCl, and the value of x is 1.
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Which of the following best describe what the major extinctions noted on the timeline indicate?
Read Passage
A
All organisms before those extinctions were wiped out, and life on Earth began again after each extinction.
B
No fossil evidence prior to these extinctions survives.
C
The Earth did not form until 540 million years ago.
D
Many, but not all, species of life on Earth were wiped out by these extinctions.
Answer:
D - Many, but not all, species of life on Earth were wiped out by these extinctions.
Explanation:
The major extinctions noted on the timeline indicate that many species of life on Earth were wiped out during these events, but not all. The extinctions had a significant impact on the biodiversity of life on Earth and shaped the evolution of life as we know it today. The fossil evidence shows that some species survived the extinctions, while others disappeared completely. These events provide a window into the complex history of life on Earth and the impact of environmental and geological factors on the evolution of life.
Answer:
D...................................
Explanation:
When a lab instructor checked the stockroom, he found 60.0 grams of sodium hydroxide left in the container. What volume (in mL) can he make of a 0.25 M solution?
to find percent by volume: [tex]\frac{volume of solute (mL)}{volume of solution (mL)}[/tex] X 100
to find Molarity: [tex]\frac{moles}{liters}[/tex]
Therefore, the lab instructor can make 6000 mL (or 6.00 L) of a 0.25 M solution from 60.0 grams of sodium hydroxide.
what is sodium hydroxide ?
Sodium hydroxide (NaOH) is a highly caustic and reactive compound that is also known as lye or caustic soda. It is an inorganic base that is typically produced through the electrolysis of a sodium chloride (salt) solution.
Sodium hydroxide is commonly used in many industrial processes
To find the volume (in mL) of a 0.25 M solution that can be made from 60.0 grams of sodium hydroxide, we can use the following formula:
moles of solute = Molarity x volume (in liters)
First, we need to calculate the number of moles of sodium hydroxide present in 60.0 grams:
moles of NaOH = mass / molar mass
moles of NaOH = 60.0 g / 40.00 g/mol (molar mass of NaOH)
moles of NaOH = 1.50 mol
Next, we can rearrange the formula to solve for the volume (in liters) of the solution:
volume = moles of solute / Molarity
volume = 1.50 mol / 0.25 M
volume = 6.00 L
Finally, we can convert the volume to milliliters:
volume (in mL) = 6.00 L x 1000 mL/L
volume (in mL) = 6000 mL
Therefore, the lab instructor can make 6000 mL (or 6.00 L) of a 0.25 M solution from 60.0 grams of sodium hydroxide.
To find percent by volume, we need to know the volume of solute and the volume of solution. Percent by volume is calculated as:
percent by volume = (volume of solute / volume of solution) x 100
To find Molarity, we can use the formula:
Molarity = moles of solute / volume of solution (in liters)
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A reaction and its experimentally determined rate law are represented above. A chemist proposes two different possible mechanisms for the reaction, which are given below.
Mechanism 1
X2 → 2 X (slow)
X + Y2 → XY2 (fast) X + XY2 → X2Y2 (fast)
Mechanism 2
X2 → 2 X (slow)
X + Y2 → XY + Y (fast) X + XY → X2Y (fast)
X2Y + Y → X2Y2 (fast) Based on the information above, which of the following is true?Both mechanism 1 and 2 are consistent with the rate law.Only mechanism 2 is consistent with the rate law.Neither mechanism 1 nor mechanism 2 is consistent with the rate law.Only mechanism 1 is consistent with the rate law
Based on the information above, the following statement is true - Both mechanism 1 and 2 are consistent with the rate law.
The series of fundamental processes via which a chemical reaction takes place is known as a reaction mechanism. A multistep or complex reaction is one that involves two or more simple processes. A chemical species that is produced in one fundamental stage of a reaction and destroyed in the next is referred to as an intermediate. The rate-determining step is the one that moves the most slowly in a reaction system. The rate-determining phase establishes the rate law for the entire response by limiting the total rate.
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the concentration of carbon dioxide in surface water is low, whereas the concentration of oxygen is high because of the .
Because of the process of photosynthesis, surface water normally has a low percentage of carbon dioxide (CO2) and a high concentration of oxygen (O2).
In order to create organic matter and release oxygen as a byproduct, plants, algae, and some bacteria engage in a process known as photosynthesis. In aquatic conditions, phytoplankton—a microscopic algae that floats close to the water's surface—performs the majority of the photosynthesis.
During photosynthesis, phytoplankton take in carbon dioxide from the water and utilise it to fuel a sequence of chemical reactions that result in the production of organic matter. The amount of carbon dioxide in the water therefore drops. At the same time, oxygen is released by phytoplankton as a byproduct, raising the oxygen content in the liquid. This explains why surface water often has a high oxygen content.
Other elements, such as gas exchange with the atmosphere, the breakdown of organic materials, and aquatic species' respiration, can also have an impact on the amount of carbon dioxide in surface water. The main mechanism, however, for the high concentration of oxygen and low concentration of carbon dioxide in surface water is photosynthesis.
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What happened to the shape of some objects when force was applied to them
When force is applied to the objects, then the shape of some objects deforms. It modifies the relative locations of the crystal lattice's constituent particles.
Interatomic or intermolecular forces begin to operate as soon as that occurs, and they have a tendency to return the solid to its former configuration. Force is defined as a physical quantity that has the power to alter an object's condition and shape. A force imparted to an object causes it to alter shape. For instance, a piece of metal changes shape when hit with a hammer. A contact force that is applied to an object externally is referred to as an applied force. The object moves or deforms as a result of the applied force. In general, an object moves in the direction of a force. Assume a pulley is used to raise it off the ground. In that situation, the object is moving in the opposite direction from where the force is being applied.
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which of the following related to phase changes of water is incorrectly matched? which of the following related to phase changes of water is incorrectly matched? deposition - energy released melting - energy absorbed condensation - energy released sublimation - energy absorbed evaporation - energy released
Determine the water phase transition that is not appropriately matched: Melting - energy absorbed (should be energy released).
Melting - energy absorbed is the wrong answer in the options that are connected to the phases of water. In order to overcome the intermolecular interactions and transform the solid state of the material into a liquid, energy must be absorbed by the substance during melting. In contrast, energy is released when water vapour transforms into liquid in condensation as opposed to deposition, when it transforms into ice first. When solid ice transforms into water vapour in the process of sublimation, energy is absorbed, and as liquid water transforms into water vapour in the process of evaporation, energy is released.
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what type of bonding creates a substance that has the ability to conduct electricity when solid?
Metallic bonding produces a material that, when solid, may conduct electricity.
The passage of electrons determines the conductance of electricity. Atoms and molecules in the crystal lattice are arranged in a certain way in the solid state with the help of metallic bonding. Therefore, the electrons shouldn't be permitted to travel at all. The solids must be in a constant condition since they cannot carry electricity. However, certain solid substances do carry electricity.
Conductors are solid substances that have the ability to conduct electricity. This group includes the metals. The delocalized electrons are what give this material such a high conductivity. The flux of electrons affects conductance. Metals have relatively loosely bonded valence electrons that are simple to remove from their orbitals. They boost the conductivity by producing an ocean of electrons.
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which of the following aqueous solutions will have the highest boiling point? which of the following aqueous solutions will have the highest boiling point? 0.10 m na2so4 0.20 m glucose 0.10 m nacl 0.10 m srso4 0.25 m sucrose
Among the given aqueous solutions, 0.25 M sucrose will have the highest boiling point. Boiling point of a substance is the point in which the vapor pressure of a liquid is equal to the surrounding pressure.
Here we have given the molality of different aqueous solutions including 0.10 M [tex]Na_{2} SO_{4}[/tex] , 0.20 M glucose, 0.10 M [tex]NaCl[/tex], 0.10 M [tex]Sr SO_{4}[/tex] and 0.25 M sucrose.
The boiling point will be depending on the molality of each solution given. Molality is the number of moles of solute per kilogram of solvent. When molality is higher boiling point also will be higher.
We are considering the solutions with same temperature and pressure. Now the solution with the highest molality will be the one with the highest boiling point.
0.10 M [tex]Na_{2} SO_{4}[/tex]: [tex]Na_{2} SO_{4}[/tex] has a molar mass of 142 g/mol, so 0.10 M means there are 14.2 g of [tex]Na_{2} SO_{4}[/tex] per liter of solution. If we assume the density of the solution is 1 g/mL, then the molality is 0.10 mol / 0.1 kg = 1.0 m.
0.20 M glucose: Glucose has a molar mass of 180 g/mol. That is 0.20 M means there are 36 g of glucose per liter of solution. If we assume the density of the solution is 1 g/mL, then the molality is 0.20 mol / 0.1 kg = 2.0 m.
0.10 M [tex]NaCl[/tex]: [tex]NaCl[/tex] has a molar mass of 58.5 g/mol. That is 0.10 M means there are 5.85 g of [tex]NaCl[/tex] per liter of solution. If we assume the density of the solution is 1 g/mL, then the molality is 0.10 mol / 0.1 kg = 1.0 m.
0.10 M [tex]SrSO_{4}[/tex]: [tex]SrSO_{4}[/tex] has a molar mass of 183.7 g/mol. That is 0.10 M means there are 18.37 g of [tex]SrSO_{4}[/tex] per liter of solution. If we assume the density of the solution is 1 g/mL, then the molality is 0.10 mol / 0.1 kg = 1.0 m.
0.25 M sucrose: Sucrose has a molar mass of 342 g/mol. That is 0.25 M means there are 85.5 g of sucrose per liter of solution. If we assume the density of the solution is 1 g/mL, then the molality is 0.25 mol / 0.1 kg = 2.5 m.
Therefore, the solution with the highest molality and hence the highest boiling point will be 0.25 M sucrose.
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nuclei differ in their stability, and some are so unstable that they undergo radioactive decay. the ratio of the number of neutrons to the number of protons in a nucleus (n/z) correlates with its stability. calculate the n/z ratio for 147sm.
Nuclei differ in their stability, and some are so unstable that they undergo radioactive decay. the ratio of the number of neutrons to the number of protons in a nucleus (n/z) correlates with its stability. 1.41 is the n/z ratio for 147Sm.
What is radioactive decay?The process by which an unstable atomic nucleus loses energy through radiation is known as radioactive decay (also referred as nuclear decay, radioactivity, radioactive disintegration, and nuclear disintegration). A radioactive substance is one that contains unstable nuclei.
Nuclei differ in their stability, and some are so unstable that they undergo radioactive decay. the ratio of the number of neutrons to the number of protons in a nucleus (n/z) correlates with its stability.
n/z ratio = 88/62= 1.41
Therefore, 1.41 is the n/z ratio for 147Sm.
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considering the frequency of non-polar bonds in each type of molecule, which type of molecule should have the most potential energy (assuming you have the same mass of each)?
Considering the frequency of non-polar bonds in each type of molecule, the molecule with the most potential energy should be the one with the highest number of non-polar bonds.
Non-polar bonds are stronger than polar bonds and so molecules with more of these bonds can store more energy due to their increased stability. For example, molecules with higher amounts of carbon-carbon and carbon-hydrogen bonds tend to have higher potential energies than molecules with more polar bonds such as oxygen-hydrogen bonds. Non-polar bonds are bonds between two atoms that have the same electronegativity, such as two atoms of carbon or two atoms of hydrogen. These bonds do not have a charge distribution and no molecules are attracted to them, which makes them non-polar. Polar bonds, on the other hand, are bonds between two atoms with different electronegativities, such as oxygen and hydrogen or nitrogen and hydrogen. These bonds have a partial charge distribution, which means that molecules are attracted to them, and this makes them polar.
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