Answer:
The relationship between concentration and density is straightforward: the more solute that is dissolved in a solvent, the greater the density of the solution. In the case of a 50% solution of ethylene glycol in water, the density of the solution would be higher than that of pure water due to the presence of the ethylene glycol, which is denser than water. By measuring the density of the solution, it is possible to determine the concentration of ethylene glycol in the solution.
At 20 °C, the density of pure ethylene glycol is 1.135 g/mL while the density of water is 1.000 g/mL. So a solution that is 50% ethylene glycol would have a density that is intermediate between these two values, and its density could be used to determine the concentration of ethylene glycol in the solution. The greater the concentration of ethylene glycol, the greater the density of the solution, and vice versa. By measuring the density of the solution, it is possible to determine the concentration of ethylene glycol, and hence its suitability as antifreeze in an automobile radiator.
Explanation:
The cytoplasm of a cell is filled with salts, sugars, proteins, and other molecules.
This means that cells usually have a lower concentration of water compared with
their external environment.
Considering this, what would happen if a cell were placed in
freshwater?
A. The cell would shrink as water moved along a concentration gradient from
low to high.
B. The cell would remain the same due to its semipermeable membrane.
C. The cell would shrink as water moved from an area of high solute
concentration to an area of low solute concentration.
D. The cell would burst as water moved into the cell along a concentration
gradient from high to low.
The cell would burst as water moved into the cell along a concentration gradient from high to low.
What would happen to a salt filled cell in fresh water?If a salt-filled cell is placed in fresh water, osmosis will occur. Osmosis is the diffusion of water molecules from an area of high concentration to an area of low concentration through a semi-permeable membrane. In this case, the semi-permeable membrane is the cell membrane that surrounds the salt-filled cell.
Since the concentration of salt inside the cell is higher than the concentration of salt in the fresh water, water molecules will move from the fresh water into the cell in an attempt to balance the concentration of salt on both sides of the membrane. This results in an increase in the volume of the cell, which can cause the cell to swell or even burst.
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What mass of HCl is contained in 45.0 mL of an aqueous HCl solution that has a density of 1.19g cm ^ - 3 and contains 37.21% HCl by mass?
Answer:
0.01999 g
Explanation:
To find the mass of HCl in 45.0 mL of the solution, we need to first find the volume of the solution and then convert that volume to mass.
First, we can convert 45.0 mL to liters by dividing by 1000:
45.0 mL ÷ 1000 = 0.045 L
Next, we can find the mass of the solution by multiplying the volume by the density:
0.045 L × 1.19 g/cm³ = 0.05365 g
Now that we have the mass of the solution, we can find the mass of HCl by multiplying the mass of the solution by the concentration of HCl expressed as a decimal:
0.05365 g × 0.3721 = 0.01999 g
So, there is approximately 0.01999 g of HCl in 45.0 mL of the solution.
Provide the correct IUPAC name for CrPO₄ · 3H₂O.
Answer:
Chromium(III) phosphate trihydrate
Explanation:
The correct IUPAC name for CrPO4 · 3H2O is Chromium(III) phosphate trihydrate.
what is the main function of the mitochondria in a plant cell
Explanation:
The main function of the mitochondria in a plant cell is to generate energy for the cell through the process of cellular respiration. The mitochondria convert the energy stored in food into a form that the cell can use through the oxidation of glucose and other organic molecules, which produces ATP (adenosine triphosphate) - the energy currency of the cell. Additionally, the mitochondria play a role in regulating the cell's metabolic processes and also in controlling cell death (apoptosis).
Hospital patients are administered oxygen from an pressurized hyperbaric oxygen chamber at 3.0 atm. 600.0 L of oxygen is compressed in a cylinder at 160.0 atm. What volume of oxygen can a cylinder supply at the given pressure?
a. 32 × 103 L
b. 32 L
c. 11 L
d. 11 × 103 L
The volume of the oxygen cylinder at a pressure of 3.0 atm is 11.25 L. The closest answer choice to this value is option C. 11 L.
How did we get the value?We can use the ideal gas law, PV = nRT, to solve this problem. Here, P is the pressure, V is the volume, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature (assumed to be constant). Rearranging the equation, we get:
V = nRT/P
The number of moles of gas, n, can be found using the ideal gas law:
n = PV/RT
Substituting this expression for n into the equation for V and rearranging, we get:
V = PV/P = 600.0 L
So, at a pressure of 160.0 atm, the volume of the oxygen cylinder is 600.0 L. To find the volume of the oxygen cylinder at a pressure of 3.0 atm, we need to use the relationship between pressure and volume for a gas:
V1/V2 = P2/P1
Rearranging, we get:
V2 = V1 * (P2/P1) = 600.0 L * (3.0 atm / 160.0 atm) = 11.25 L
So, the volume of the oxygen cylinder at a pressure of 3.0 atm is 11.25 L. The closest answer choice to this value is (c) 11 L.
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To what volume should you dilute 133 ml of an 7.95 M CuCl solution so that 52.0 mL of the diluted solution contains 4.20 g CuCl₂?
Answer:
172 ml
Explanation:
To determine the volume to which you should dilute 133 ml of a 7.95 M CuCl2 solution so that 52.0 mL of the diluted solution contains 4.20 g of CuCl2, you need to use the equation for molarity:
M = moles of solute / liters of solution
We know the moles of solute, which can be calculated from the mass of CuCl2 using the molar mass:
4.20 g CuCl2 / (1 mole CuCl2 / 134.45 g CuCl2) = 0.0311 moles CuCl2
And we know the volume of the diluted solution, which is 52.0 mL or 0.052 L. Plugging in these values, we can solve for the molarity of the diluted solution:
M = 0.0311 moles CuCl2 / 0.052 L = 0.596 M
Now that we know the molarity of the diluted solution, we can use the equation for dilution to determine the volume to which we should dilute the original solution:
C1V1 = C2V2
Where C1 and V1 are the concentration and volume of the original solution and C2 and V2 are the concentration and volume of the diluted solution. Plugging in the values, we have:
7.95 M * V1 = 0.596 M * 0.133 L
Solving for V1, we get:
V1 = 0.133 L * 0.596 M / 7.95 M = 0.0172 L = 172 mL
So, to achieve the desired concentration in 52.0 mL of the diluted solution, you should dilute 133 mL of the 7.95 M CuCl2 solution to a volume of 172 mL
1.discuss breifly about types of quantum numbers"
Answer:
Explanation:
Quantum numbers are a set of numbers that describe the state of an electron in an atom. There are four types of quantum numbers:
Principal quantum number (n): This quantum number determines the energy level of an electron in an atom. The larger the value of n, the higher the energy level and the farther the electron is from the nucleus.
Azimuthal quantum number (l): This quantum number determines the shape of the electron orbital. The value of l can range from 0 to n-1, and it describes the angular momentum of the electron.
Magnetic quantum number (m): This quantum number determines the orientation of the electron orbital in space. The value of m can range from -l to +l, and it describes the orientation of the orbital.
Spin quantum number (s): This quantum number describes the intrinsic angular momentum, or spin, of an electron. The value of s is always ±1/2.
These four quantum numbers together describe the state of an electron in an atom, including its energy, shape, orientation, and spin. Understanding these quantum numbers is essential for understanding the behavior of electrons in atoms and for predicting the properties of chemical compounds.
Given the following list from the activity se- ries of metals (from most active to least ac- tive) K, Na, Al, Mn, Cr, Cd, Co, Pb, Hg which reaction would you NOT expect to occur?
1. Na(s) + Mn2+(aq) → Na+(aq) + Mn(s)
2. Co2+(aq) + Al(s) → Al3+(aq) + Co(s)
3. Cd(s) + Pb2+(aq) → Pb(s) + Cd2+(aq)
4. Al3+(aq) + Cr(s) → Cr3+(aq) + Al(s)
5. All of the listed reactions will occur.
Answer:
Explanation:
According to the activity series of metals, the reaction that would not be expected to occur is:
Al3+(aq) + Cr(s) → Cr3+(aq) + Al(s)
This is because aluminum (Al) is higher on the activity series and is less likely to be oxidized (lose electrons), while chromium (Cr) is lower on the activity series and is more likely to be oxidized. In this reaction, aluminum would have to be oxidized, which is not consistent with its position on the activity series.
All of the other reactions listed are expected to occur because they involve the transfer of electrons from a metal that is lower on the activity series to a metal that is higher on the series.
Consider 1.00 mole of hydrogen gas, H2. How many dihydrogen molecules are present? How many hydrogen atoms are present? What is the mass of this sample?
Consider 1.00 mole of hydrogen gas, H₂. The number of molecules in H₂ is12.044 × 10²³ molecules. The number of hydrogen atoms is 12.044 × 10²³ molecules and the mass of the sample is 2 g.
The moles of the hydrogen = 1 mol
The one mole of the substance = 6.022 × 10²³ atoms / molecules
The number of the hydrogen atoms in H₂ = 2 × 6.022 × 10²³ atoms
The number of the hydrogen atoms in H₂ = 12.044 × 10²³ atoms
The number of the hydrogen molecules in H₂ = 12.044 × 10²³ molecules
The molar mass of the H₂ = 2 g/mol
The moles of the H₂ = mass / molar mass
The mass of the H₂ = moles × molar mass
The mass of the H₂ = 1 ×2
The mass of the H₂ = 2 g
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Be sure to answer all parts. A student is given four solid samples labeled W, X, Y, and Z. All have a metallic luster. She is told that the solids could be gold, lead sulfide (PbS), quartz which is SiO2, and iodine. The results of her investigations are: (a) W is a good electrical conductor; X, Y, and Z are poor electrical conductors. (b) When the solids are hit with a hammer, W flattens out, X shatters into many pieces, Y is smashed into a powder, and Z is not affected. (c) When the solids are heated with a Bunsen burner, Y melts with some sublimation, but X, W, and Z do not melt. (d) In treatment with 6 MHNO3, X dissolves; there is no effect on W, Y, or Z. On the basis of these test results, identify the solids. Sample W Au PbS SiO2 Sample X: Au PbS Sample X: Au PbS SiO2 I, Sample Y: Au PbS SiO2 I2 Sample Z: Au PbS Au PbS SiO2 Sample Z: Au PbS SiO2
It has a metallic sheen that denotes the presence of lead sulphide and gold (Au). However the fact that it is unaffected by a hammer shows that quartz may also be present.
As sample W is an excellent electrical conductor and does not melt when heated with a Bunsen burner, the presented findings of the research indicate that it is gold (Au). When Sample X breaks into several pieces when struck with a hammer and dissolves in 6 MHNO3, it is lead sulphide (PbS). Since Sample Z is unaffected by hammer blows and does not melt when heated with a Bunsen burner, yet does not dissolve in 6 MHNO3, it is a combination of gold (Au), lead sulphide (PbS), and quartz (SiO2). It also exhibits a metallic shine, which denotes the presence of lead sulphide and gold. Nonetheless, the fact that a hammer has no effect on it shows that quartz may also be present.
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which of the following conditions would increase the rate of diffusion within cells? (check all possible correct options)a. increas temperature
b. large concentrate gradient
c. solute of large size
d. lack of carrier proteins
e. solute of small size
The circumstances listed below would accelerate diffusion within cells: 1. Boost the temperature. b. High concentration gradient e.
The spontaneous movement of particles from a high concentration area to a low concentration area is known as diffusion. In gases, liquids, and solids, it happens spontaneously as a passive transport mechanism. Temperature, concentration gradient, particle size, and the existence of barriers or impediments are some of the variables that affect the rate of diffusion. Several biological activities, such as the flow of gases into and out of cells, the transportation of nutrients and waste products across cell membranes, and the control of ion concentrations in cells, all depend on diffusion. Diffusion theory is fundamental to many disciplines, including chemistry, biology, physics, and engineering.
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AgNO3(aq) + NaCl(aq) → AgCl(s)+ NaNO3(sq)
O Decomposition
O Synthesis
O Combustion
O Double Replacement
O Single Replacement
O Acid/Base Neutralization
The chemical equation given above is an example of double replacement reaction (option D).
What is a chemical reaction?Chemical reaction is a process, typically involving the breaking or making of interatomic bonds, in which one or more substances are changed into others.
A chemical reaction can be of various types as follows:
DecompositionSynthesisCombustionDouble ReplacementSingle ReplacementAcid/Base NeutralizationA double replacement reaction involves the substitution of two substances in the reaction. In the above equation, silver and sodium is replaced.
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The sugars we have been discussing are made directly through a series of reactions in the____ , which uses co2 as a starting input. a. light reaction a. recall, that under thermodynamic laws, building complex molecules requires the input of energy in the form of sunlight. that energy in photosynthesis comes from the . b. calvin cycle a. through a series of reactions in the , light energy is transformed into energy that is in the form of atp and high-energy electrons carried by nadph. b. in the , h2o is used and outputs as o2. a. in the , atp and nadph enter and output as adp and nadp.
The sugars we have been discussing are made directly through a series of reactions in the Calvin Cycle, which uses CO2 as a starting input.
Recall that under thermodynamic laws, building complex molecules requires the input of energy in the form of sunlight. That energy in photosynthesis comes from the Light Reaction. Through a series of reactions in the Light Reaction, light energy is transformed into energy that is in the form of ATP and high-energy electrons carried by NADPH. In the Light Reaction, H2O is used and outputs as O2. In the Calvin Cycle, ATP and NADPH enter and output as ADP and NADP. These processes work together to produce glucose and other sugars that are essential for life. The sugars we have been discussing are made directly through a series of reactions in the Calvin Cycle, which uses CO2 as a starting input.
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9. A brand of gasohol (gasoline containing alcohol)
contains 10.% ethanol by volume. How many
milliliters (mL) of ethanol are in a 0.750-gallon
sample of the gasohol? (1 gall = 3.785 L)
(A) 283.875 mL
(B) 280 mL
(C) 0.284 mL
(D) 2.8 x 10-4 mL
283.875 mL of ethanol are in a 0.750gallon sample of the gasohol. Therefore, the correct option is option A.
What is ethanol?Ethanol, sometimes known as ethyl alcohol, is a chemical liquid having the formula C2H5OH. Its primary application is as a solvent. To comprehend the chemical composition of ethanol, you must first grasp what alkenes are.
Alkenes are carbon and hydrogen molecules containing at at least one double bond between two carbons. Ethene is an example of an alkene.
1 gall = 3.785 L
0.750gallon =?
0.750gallon ×3.785 L / 1 gallon
= 2838.75 ml
10% of 2838.75 ml= 283.875 mL
Therefore, the correct option is option A.
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What type of reaction would most likely occur when magnesium reacts with bromine?
O Double Replacement
O Synthesis
O Decomposition
O Single Replacement
O Acid/Base (Neutralization)
Combustion
The type of reaction that would most likely occur when magnesium reacts with bromine is synthesis.
The correct option is B.
What is a synthesis reaction?Synthesis reactions are a particular kind of reaction in which several reactants combine to create a single product. It is a sort of chemical reaction in which two or more straightforward chemicals combine to create a more complicated end result. elements or compounds could be the reactants.
The reaction between magnesium and bromine is an example of a synthesis reaction and is shown below:
Mg + Br₂ ---> MgBr₂
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C3H7COOH + O2 → CO₂ + H₂O
CO2+H2O
The coefficient of oxygen =.......
Whoever is constantly answering my questions just know that I love you
Answer:
The coefficient of oxygen in the balanced equation is 2.
Explanation:
a mixture containing 0.765 mol He(g), 0.330 mol Ne(g), and 0.110 mol Ar(g) is confined in a 10.00 L vessel at 25 degrees celsius. Calculate the partial pressure of each gases in the mixture and calculate the total pressure of the mixture
The total pressure of the mixture is 356585 Pa.
How to calculate the partial pressure of each gas in the mixtureFirst we can use the formula:
partial pressure = mole fraction * total pressure
where the mole fraction is the number of moles of a gas divided by the total number of moles in the mixture.
The total number of moles in the mixture is:
n_total = n_He + n_Ne + n_Ar = 0.765 mol + 0.330 mol + 0.110 mol = 1.205 mol
The mole fraction of each gas in the mixture is:
X_He = n_He / n_total = 0.765 mol / 1.205 mol = 0.6357
X_Ne = n_Ne / n_total = 0.330 mol / 1.205 mol = 0.2743
X_Ar = n_Ar / n_total = 0.110 mol / 1.205 mol = 0.0909
The total pressure of the mixture is equal to the sum of the partial pressures of each gas:
P_total = P_He + P_Ne + P_Ar
To calculate each partial pressure, we can use the formula:
partial pressure = mole fraction * total pressure
P_He = X_He * P_total = 0.6357 * P_total
P_Ne = X_Ne * P_total = 0.2743 * P_total
P_Ar = X_Ar * P_total = 0.0909 * P_total
We can now use the ideal gas law to calculate the total pressure of the mixture. The ideal gas law is:
PV = nRT
where
P is the pressure (in Pa) V is the volume (in m³) n is the number of moles R is the gas constant (8.314 J/(mol·K))T is the temperature (in K)Converting the volume and temperature to the appropriate units, we get:
V = 10.00 L = 0.01 m³
T = 25 °C = 298 K
Substituting the given values and solving for P, we get:
P_total = n_total * R * T / V = 1.205 mol * 8.314 J/(mol·K) * 298 K / 0.01 m³ = 356585 Pa
Therefore, the partial pressure of each gas in the mixture is:
P_He = 0.6357 * 356585 Pa = 226789 Pa
P_Ne = 0.2743 * 356585 Pa = 97782 Pa
P_Ar = 0.0909 * 356585 Pa = 32414 Pa
And the total pressure of the mixture is:
P_total = P_He + P_Ne + P_Ar = 356585 Pa
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How would you calculate the molar mass of a compound?
Add together all the atomic masses of the component atoms to determine the molar mass of a compound containing numerous atoms.
What is the molar mass of Ca(NO3)2?
Add together all the atomic masses of the individual atoms to determine the molarity of the a compound with numerous atoms. Ca(NO3)2 has a molar mass of 164.1 g/mol.
What is an element's molar mass?The density in grams with one molar (6.02 x 1023 molecules) of a metal is its molar mass. Therefore, in the majority of circumstances, all you need to do is look at an element's atomic mass (atoms) on the periodical table to determine its molar mass. Keep in mind that it is the number that is listed beneath the element's name and symbol.
How is a substance's molar mass determined *?The mass in kilograms of one mole of an substance is its molar mass. As this video demonstrates the computed molar mass can then be used to translate between mass and the quantity of moles in the substance.
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The pressure of a sample of helium in a 200. Ml container is 2. 0 atm. If the helium is compressed to a volume of 10. Ml without changing the temperature, what would be the pressure of the gas?.
Ml without changing the temperature,The pressure of the gas is [tex]16.8atm[/tex]
The pressure of a gas is related to its volume and temperature by the ideal gas law:
PV = nRT
n is the number of moles of gas, P is the pressure, V is the volume, R is the ideal gas constant, and T is the temperature.
Since we know the initial pressure, volume, and temperature, we can rearrange the equation to solve for n:
[tex]n =\frac{ PV}{RT}[/tex]
Now that we know the amount of gas, we can use the same equation to calculate the pressure when the gas is compressed to 10. Ml without changing the temperature:
[tex]P = \frac{nRT}{V}\\\\P = (\frac{PV}{RT}) * (\frac{RT}{V})\\\\P = (2.0 atm * 200. Ml) / (0.08206 L atm K ^{-1} mol^{-1} * 298.15 K) \\\\P = 16.8 atm[/tex]
Therefore the pressure of the gas is [tex]16.8atm[/tex]
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LAPTOP CART 3
COMPUTER 15
Match the group with it's correct group name.
Group Name
1. alkaline earth metals
2. halogens
3. transiton metals
4. carbon family
5. noble gases
6. alkali metal
7. boron family
8. nitrogen family
9. oxygen family
Periodic Table Quiz
Group
a 1 or IA
-configuration
b. 2 or 2A
c. 3 or 3A
d.
14 or 4A
15 or SA
f. 16 or 6A
17 or 7A
b. 18 or SA
3B to 2B
Answer the following questions.
10. How many valence electrons do the halogens have in their valence shell?
11.How many valence electrons do the alkali metals have in their valence shell?
12. The maximum of valence electrons is?
13. The principle that the properties of the elements are arranged in increasing order of
their atomic numbers is called the
14. The group of eight electrons filling the s and p orbitals of the higher-most energy
level of an atom is called
15. Give the noble gas for Al
16. Give the configuration for Ca
17. Give the configuration for Ca ion
18. Give the configuration for the elements that are isoelectronic with Neon (Ne) when
they form a l' ion element name
e-configuration
e-configuration
19.
1-ion element name
20. Which group of elements is the least reactive?
fout act
l
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WHEAT AND
Group 1 (Alkali Metals)
Group 2 (Alkaline Earth Metals)
Group I: Lithium and sodium make up the elements.
Chlorine and bromine are the elements in Group I7.
Neon and argon are the elements in Group I8.
What are halogens?
The only periodic table group with elements in all three of the primary states of matter at standard pressure and temperature—though not much above room temperature—is the group of halogens. In groups 1 and 15, the same holds true if white phosphorus is assumed to be the standard state.
All of the halogens react with hydrogen to create acids.
Minerals or salts are often used to manufacture the majority of halogens.
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Write the two possible conversion factors using Avogadro's number:
One mole of a substance is equal to 6.022 × 10²³ units of that substance The number 6.022 × 10²³ is known as Avogadro's number or Avogadro's constant.
What is the conversion for Avogadro's number?Hence, the first conversion is the number fundamentally which is 6.022x1023 particles 1 mole to convert an integer of moles to particles and the other one is the reciprocal of Avogadro's number which is 1 mole 6.022x1023 particles to convert a number of specks to a number of moles.
The word mole mentions Avogadro's number of a substance. For example, a mole of carbon-12 atoms happens to be 12 grams. Moreover, a mole of hydrogen particles is 2 grams while a mole of hydrogen conversion atoms occurs to be 1 gram.
So we can conclude that conversion allying Avogadro's Number of Atoms to Moles and Vice Versa
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The two possible conversion factors using Avogadro's number are:
From moles to number of particles:1 mole = Avogadro's number of particles
So, the conversion factor is Avogadro's number of particles/mole.
From number of particles to moles:1 mole = Avogadro's number of particles
So, the conversion factor is 1 mole/Avogadro's number of particles.
What is Avogadro's number?Avogadro's number is described as the number of atoms, ions, or molecules in one mole of a substance.
The Avogadro constant has defining constant with an exact value of 6.02214076×10²³ reciprocal moles.
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A compound is found to have a molar mass of 598 g mol-1. If 39 mg of the compound is dissolved in enough water to make 162 mL of solution at 25 oC, what is the osmotic pressure of the resulting solution (in units of mbar). Report your answer to 1 decimal place. (R = 0.08314 bar L mol-1 K-1)
The osmotic pressure of a solution made by absorbing 0.822 g of it within 300 cm 3 of water is 149 mm Hg at 298 K. The solute has a molar mass of 342 g mol 1.
How can you determine a solute's molar mass?Calculate the molar mass of the solution using the depression at the freeing point (T f). Next, determine the moles of solute using the molality equation. To get the molar mass, divide the solute's mass in grams by the number of moles.
How do you determine the mass percent concentration of a solute and a solvent?The percentage of a solute in the solvent is one way to express a concentration of a solution. The percentage can be determined further in one of two ways the quantity determined by dividing the amount of the solute by the concentration of the sample.
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can anyone help with this?
Combination reaction, decomposition reaction , single displacement reaction and double displacement reactions are taking place in picture .
Define combination reaction.
When two or more compounds combine to create a single new substance, this reaction is called a combination reaction. Synthesis reactions are another name for combination reactions. A+B⇒AB is the standard format for a combination reaction. Two components combining to create a compound is an example of a combination reaction.
When a less reactive element is pushed out of a compound that also contains a more reactive ingredient, the result is a displacement reaction. Decomposition reactions occur when complex chemical entities split apart into smaller components. Decomposition reactions often demand energy input. For instance, the thermal breakdown of potassium chlorate (KClO3) is a typical technique used in laboratories to generate oxygen gas.
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the set of positions occupied by the three oxygen atoms
The three oxygen atoms can occupy three distinct positions in space. These positions can be identified by their coordinates in three-dimensional space.
What is the space?The space is an area or volume that exists between two or more objects, areas, or surfaces. In scientific terms, it is the distance between two points in three-dimensional space. It can also refer to a gap between two events, feelings, or other entities. In mathematics, space is a measure of the dimensionality of a given set, which can be described as the number of degrees of freedom within a given set. In physics, space is the physical realm of existence that encompasses all matter and energy. It is a fundamental component of reality and the universe.
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The operator of an ethanol production plant needs to estimate how much sugar is available in a
fermenter for conversion to ethanol. The fermenter contains 12,000 kg of a sugar solution. The
density of this sugar solution is 1.07 g/ml. Use this graph to estimate the total mass of sugar
available in the 12,000 kg solution.
The total mass of sugar that is available in 12000 kg is given as 2400
How to solve for the mass of sugarThe equation is y = 0.004256x + 0.9857
sugar solution has a density of 1.07
The concentration (X axis) is 20% at 1.07.
We are aware that the solution weighs 12000 kg.
So, the mass of sugar makes up 20% of the 12000 kg.
20 / 100 x 12000 = 2400
I have the answer: 2400 Kg.
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What does it mean for heat to be transferred by thermal conduction?
• A. Energy is transferred through converting bond energy to kinetic
energy.
•
B. Energy is transferred when one molecule collides with another.
• C. Energy is transferred when molecules absorb electromagnetic
waves.
®
D. Energy is transferred through moving currents of warmer air or
liquid.
The difference in temperature causes the transfer of heat from one point to another. Energy is transferred when one molecule collides with another. The correct option is B.
What is conduction?The process of transmission of energy from the particles of one medium to another as a result of the collision between the particles is defined as the conduction. An area with higher kinetic energy transfers thermal energy towards the area of lower kinetic energy.
When a substance is heated particles will gain more energy and vibrate more. These molecules then bump into nearby particles and transfer some of their energy to them. This then continues and passes the energy from hot end to the cold end.
Thus the correct option is B.
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Sodium chlorate decomposes into sodium chloride and oxygen gas as seen in the equation below.
2NaClO3 --> 2NaCl +3O2
How many moles of NaClO3 were needed to produce 30 moles of O2? Round your answer to the nearest whole number.
Answer:
10 moles of NaClO3 were needed to produce 30 moles of O2
Explanation:
From the equation, we know that 2 moles of NaClO3 produce 3 moles of O2. To find out how many moles of NaClO3 are needed to produce 30 moles of O2, we divide the number of moles of O2 by the mole ratio:
30 moles O2 / 3 moles O2 per 2 moles NaClO3 = 10 moles NaClO3
So, 10 moles of NaClO3 were needed to produce 30 moles of O2.
Calculate strain energy for the conformer pictured below, using strain energy increments from the table.
Strain Energy for Alkanes
Interaction / Compound kJ/mol kcal/mol
H : H eclipsing 4.0 1.0
H : CH3 eclipsing 5.8 1.4
CH3 : CH3 eclipsing 11.0 2.6
gauche butane 3.8 0.9
cyclopropane 115 27.5
cyclobutane 110 26.3
cyclopentane 26.0 6.2
cycloheptane 26.2 6.3
cyclooctane 40.5 9.7
(Calculate your answer to the nearest 0.1 energy unit, and be sure to specify units, kJ/mol or kcal/mol. The answer is case sensitive.)
13.8 kJ [tex]mol-1\\[/tex] is strain energy for the conformer pictured below, using strain energy increments from the table.
The problem is based on the concept of used strain energy in the conformers.
When two non bonded groups approach each other, it results in repulsion and causes steric strain in the molecule.
Structure of conformer in eclipsed form in Newman projection is as follows:
4.0 kJ mo is energy of eclipsed H-H bond
Energy of eclipsedН-СH, 3 bond is 5.8 kJ mol
Total strain energy of conformer (S,)
E 2x eclipsed (H-H)+ eclipsed (H-CH,)
Replace eclipsed (H-H) with 4.0 kJ mol and eclipsed (H-CH) with 5.8 kJ mol to get
E 2x4.0 kJ mol +5.8 kJ mol =13.8 kJ mol
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determine the mass of potassium hydrogen phthalate needed to completely react with 30mL of 0.01 sodium hydroxide
In order for 30mL of sodium hydroxide solution to completely react, 0.061 grams of potassium hydrogen phthalate are required.
What is mass?A measurement of the amount of matter in an item, mass is a fundamental attribute of matter. It is a scalar quantity, usually expressed in grams (g) or kilograms (kg) (kg).
How do you determine it?We must first develop and balance the chemical equation for the interaction between the two chemicals in order to determine the mass of potassium hydrogen phthalate needed to react with 30mL of sodium hydroxide at 0.01M. The correct answer is:
NaKC8H4O4 + H2O = KHC8H4O4 + NaOH
One mole of KHC8H4O4 combines with one mole of NaOH to create one mole of NaKC8H4O4 and one mole of water, as shown by the equation.
The number of moles of NaOH used in the reaction may then be calculated using the supplied NaOH concentration (0.01M) and the volume of NaOH used (30mL), using the formula:
volume x concentration equals moles of NaOH.
NaOH moles= 0.01 mol/L x 0.03 L x 0.0003 mol
We know that 0.0003 moles of KHC8H4O4 are required to thoroughly react with the NaOH utilized in the process because there is a 1:1 ratio in play.
Finally, using the formula: we can utilize the molar mass of KHC8H4O4 (204.22 g/mol) to determine the mass of KHC8H4O4 required.
mass = moles X molar mass
mass = 0.0003 mol X 204.22 mol = 0.061 g
Therefore, 30mL of 0.01M sodium hydroxide requires 0.061 grams of potassium hydrogen phthalate to completely react.
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A gas has a volume of 350 ml at 45°C. If the volume changes to 400 ml, what is the new
temperature? (answer in °C)
The new temperature of the gas can be calculated using the ideal gas law: PV = nRT. Rearranging the equation to solve for temperature, we get: T = (PV)/(nR). With a volume of 400 ml, a pressure of 1 atm, and a constant R of 0.08206 L·atm/K·mol, the new temperature of the gas is 59.95°C.
Answer:
88.42°C
Explanation:
The temperature change of a gas can be calculated using Gay-Lussac's law, which states that the pressure-volume ratio of a gas is directly proportional to its temperature. The equation is:
P1/V1 = P2/V2 = (nRT)/V = constant
where P1 and V1 are the initial pressure and volume, P2 and V2 are the final pressure and volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.
Given the initial volume and temperature, we can rearrange the equation to solve for the final temperature:
T2 = (P1V1)/(nR) * (V2/P1)
Since the pressure is constant, we can simplify the equation to:
T2 = T1 * (V2/V1)
We can convert the temperature to Kelvin:
T1(K) = 45 + 273.15 = 318.15 K
T2(K) = T1 * (400/350) = 318.15 * (400/350) = 361.57 K
Finally, we can convert back to Celsius:
T2(°C) = 361.57 - 273.15 = 88.42 °C
The new temperature is 88.42°C.
ALLEN
