If the Sun's surface became much hotter (while the Sun's size remained the same), the Sun would emit more ultraviolet light but less visible light than it currently emits. The statement is True.
Solar radiation is radiant (electromagnetic) energy from the sun. It provides light and heat for the Earth and energy for photosynthesis. This radiant energy is necessary for the metabolism of the environment and its inhabitants 1. The three relevant bands, or ranges, along the solar radiation spectrum are ultraviolet, visible (PAR), and infrared.
Ultraviolet radiation makes up just over 8% of the total solar radiation.
When heat increases, so does the frequency and energy of the wavelengths. Because of this, some visible light would be converted to ultraviolet light.
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help me solve it pls
The relationship between the density (d) of a gas and the rate at which the gas diffuses is r = k/√d.
option B.
What is Graham's law of diffusion?
Graham's law of diffusion, also known as Graham's law of effusion, states that the rate of diffusion or effusion of a gas is inversely proportional to the square root of its gas density.
In other words, lighter gases diffuse or effuse faster than heavier gases at the same temperature and pressure.
Mathematically, this law is written as;
r ∝ 1/√d
r = k/√d
where;
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Buffer has pka. Calculate pH
Explanation:
To calculate the pH of a buffer with a known pKa for the conjugate acid, the Henderson-Hasselbach equation can be used to obtain the pH of the buffer:
[tex]pH = pK_a + log_{10}(\frac{[A^-]}{[HA]} )[/tex]
[A-] is the concentration of the conjugate base and [HA] is the concentration of the conjugate acid.
Please if you know the answer answer the question thank you.
The tests that show positive results for the food sample are Benedict's and Biuret tests only.
What is Benedict's and Biuret tests?Benedict's test is a chemical test used to detect the presence of reducing sugars, such as glucose, in a solution. It involves adding Benedict's reagent, which contains copper ions, to the solution and heating it. If reducing sugars are present, the copper ions are reduced to form a red precipitate.
Biuret test is a chemical test used to detect the presence of protein in a solution. It involves adding Biuret reagent, which contains copper ions, to the solution. If protein is present, the copper ions react with the peptide bonds in the protein to form a violet-colored complex.
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compare bond strength of polar and non polar molecule
The polar bond is stronger than a nonpolar bond as there is an extra force of attraction present in the polar bonds like positive and negative charges.
Polarity is a concept that describes the difference in the electron density of atoms in a molecule.
The polarity of an atom increase with the increase in electron density difference.
When the electrons are not distributed equally during the bond formation such a type of bond is called a polar bond.
When the electrons are equally distributed during the bond formation such a type of bond is called a nonpolar bond.
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Assume that the buret contains
H+ ions, the flask contains OH - ions, and each has a volume of
100 mL. How many milliliters would you need to add from the
buret to the flask to neutralize all the OH- ions in a titration procedure?[tex]The\ equation\ is:\\H^+(aq) + OH^-(aq)=H2O(l).[/tex]
Answer:
Explanation:
100
m
L
H
+
is required for complete neutralization.
Assuming, somehow, only
H
+
are in the buret and only
O
H
−
...
36.9 mL sample of a 0.423 M aqueous hydrocyanic acid solution is titrated with a 0.382 M aqueous barium hydroxide solution. What is the pH after 12.6 mL of base have been added?
The concept molarity is used here to determine the pH after adding 12.6 mL of the base. The term molarity is an important method which is used to calculate the concentration of a solution. Here the pH is 0.501.
The term molarity is defined as the number of moles of the solute dissolved per litre of the solution. It is also called the molar concentration. It is represented as 'M' and its unit is mol / L.
Molarity is given as:
M = Number of moles / Volume of solution in liters
'n' of HCN = 36.9 × 1 L / 1000 mL × 0.423 = 0.0156 mol
'n' of Ba(OH)₂ = 12.6 × 1L / 1000 mL × 0.382 = 0.0048 mol
Excess H⁺ = 0.0108
Total volume = 36.9 + 12.6 = 49.5 mL = 0.0495 L
Concentration of H⁺ = 0.0156 / 0.0495 = 0.315
So pH is:
pH = - log[H⁺]
pH = - log[ 0.315] = 0.501
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Which molecule is butane?
H H H H
A. H-C-C-C-C-H
||||
H H H H
B.
C.
H3C
C=C
H
CH3
H
H
|
D. H-C=C-C-C-H
H H
H
|
Answer: A
Explanation:
The -ane suffix implies that the compound has only single bonds for carbon-carbon bonds. The but- prefix implies that the compound consists of four carbons. Since 4 bonds are required for each carbon, there will be a total of 10 hydrogen atoms: 3 on each carbon at the end of the chain and 2 for each carbon in the middle of the chain. Thus, butane is A.
Please if you know the answer tell me thank you.
Bile increases the surface area of the fats so that it can be digested. Option A
How does bile help in the digestion of food?The liver produces bile, a greenish-yellow liquid that is kept in the gallbladder. It is critical for the small intestine's involvement in the breakdown of lipids.
Hormones tell the gallbladder to release bile into the duodenum, which is the first section of the small intestine, when food with fat enters the small intestine. Bile salts, which serve as emulsifiers, are found in bile.
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help me solve it pls
The term molefraction is an important method which is used to calculate the concentration of a solution. It is mainly employed to calculate the concentration of a binary solution. Here the molefraction is 1 / 5. The correct option are D, D and B.
Molefraction of any component of a solution is defined as the ratio of the number of moles of that component to the total number of moles of the solution. The sum of molefraction of solute and solvent is one.
Here the molefraction of nitrogen = Moles of nitrogen / Total number of moles
1. 'x' of 'N' = 2 / 5 + 3 + 2 = 0.2 or 1 / 5
2. Molefraction of Argon = 0.60 / 0.40 + 0.04 + 0.60 = 0.57
Partial pressure = Molefraction × Total pressure
0.57 × 6.3 = 3.59 atm
3. 20 cm³ mixture contains:
20 × 1 mole / 22400 m³ = 8.9286 × 10⁻⁴
1 mole occupies 22400 cm³
8.9286 × 10⁻⁴ × 22400 cm³ / 1 mole = 20 cm³
Thus the correct option are D, D and B.
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PART A: What is the amount of calcium carbonate in a 50.0g calcium carbonate?
PART B: What is the amount of carbon in 88.0g propane (C3H8)?
The amount of calcium carbonate in a 50.0g calcium carbonate is 0.5 moles while the amount of carbon in 88.0g propane is 72g.
How to calculate amount of a substance?The amount of a substance in moles can be calculated by dividing the mass of the substance by its molar mass as follows;
moles = mass ÷ molar mass
According to this question, there are 50.0 grams of calcium carbonate. The number of moles of the substance is;
moles = 50g ÷ 100g/mol = 0.5 moles
The amount of carbon in 88.0g propane can be calculated as follows;
36g ÷ 44g × 88 = 72g
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Justification of Subaquatic soil if it is sediment or soil (on the point of view of a geologist)
Subaquatic soil can be classified as sediment or soil based on its geological properties and formation processes.
Sediment refers to any material that is transported and deposited by water, wind, ice, or gravity. Sediments can be composed of various materials, such as minerals, rocks, organic matter, and even human-made debris.
Sediments can accumulate in different environments, such as rivers, lakes, oceans, and deserts, and can be deposited in layers over time.
Subaquatic soil can be classified as sediment or soil based on its geological properties and formation processes. If it has primarily formed through sediment deposition, it is more appropriate to classify it as sediment.
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Determine whether the following five molecules are polar or non polar and explain your answer: a)Beryllium chloride and trichloromethane
A polar molecule is a type of chemical compound where there is an uneven distribution of electrons among the covalently bound atoms.
Thus, The term "polarity" refers to how unlike two molecules' electrical poles are from one another. If they are quite dissimilar, the species is considered to be a highly polar molecule.
Some chemical species, such chains of carbon molecules, are believed to be nonpolar molecules because they exchange electrons equally. A molecule is often classified as polar or nonpolar based on the sum of all of its bonds taken into account.
The atom with the higher electronegativity will often draw more electrons when it is linked to another atom. If the difference is small, a nonpolar bond can be used.
Thus, A polar molecule is a type of chemical compound where there is an uneven distribution of electrons among the covalently bound atoms.
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A galvanic cell is made with two platinum electrodes. Hydrogen is bubbled into both compartments, which are separated by a salt bridge. The solution on one side contains 0.1 M hydrochloric acid, and on the other side there is a buffered sodium bicarbonate/carbonic acid solution (pKa = 6.3, total concentration 0.01 M) at pH 6.0. Which two statements about this cell are true?
- The overall cell potential at equilibrium will be 0.0592 V
- The [H+] at the HCl electrode will decrease until all the HCO3- ions on the other side of the cell are converted to H2CO3
- The side containing HCl will be the anode
- The side containing HCl will be the cathode
- The [H+] at the HCl electrode will decrease until the pH is the same on both sides of the cell
- The [H+] at the HCl electrode will increase until all the HCO3- ions on the other side of the cell are converted to CO32-.
The side containing HCl will be the anode.
The [H+] at the HCl electrode will decrease until all the HCO3- ions on the other side of the cell are converted to H2CO3.
What is the galvanic cell?In a galvanic cell, the anode is the electrode where oxidation occurs, while the cathode is the electrode where reduction occurs.
While the reduction of H+ ions to make hydrogen gas takes place at the cathode, the process at the anode involves the oxidation of hydrogen to create H+ ions. Since HCl is a source of H+ ions, the side that contains HCl will serve as the anode. As a result, claim three is accurate.
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Part 3: Writing an Article (10 points)Imagine you are a science writer who is writing a series of articles to tell people about your local natural resources. Use the information you gathered to write a 300- to 500-word article about the natural resource you chose. Explain why people should be interested in the resource, why it is found in your area, and how and why its supply is changing.
Exploring a Natural Wonder: The Crystal Clear Waters of Lake Serenity
Introduction:
Nestled in the picturesque landscape of our region lies a hidden gem, Lake Serenity. This calm body of water is not only a source of breathtaking beauty, but also a vital natural resource that deserves our attention. In this article, we'll delve into the reasons why people should be captivated by Lake Serenity, explore the factors contributing to its presence in our area, and shed light on the changing dynamics affecting its offerings.
Why should you care?
Lake Serenity is an irresistible attraction for nature lovers and wanderers alike. Its crystal clear waters provide a haven for a diverse array of flora and fauna, making it an ecosystem of immense ecological importance. From the beautiful sight of water lilies gently swaying in the breeze to the playful dances of fish beneath the glittering surface, Lake Serenity offers a refuge from the chaos of modern life. Connecting to this source not only provides a sense of calm, but also allows us to connect with nature on a deeper level, promoting personal well-being and enhancing a sense of environmental stewardship.
Local connection:
The presence of Lake Serenity in our area can be attributed to a combination of geological and hydrological factors. Thousands of years ago, glacial movements shaped the landscape and created a basin that eventually filled with water to create this beautiful lake. Located in an area rich in geological diversity, the lake owes its remarkable clarity to the surrounding rock formations, which act as natural filters, purifying the water and maintaining its pristine quality.
Change in dynamics:
While the beauty of Lake Serenity remains unblemished, it is not immune to the changing dynamics affecting our environment. Climate change and human activity pose challenges to the delicate balance of this natural resource. Rising temperatures and altered precipitation patterns have the potential to disrupt the lake's ecosystem and affect the growth and survival of its aquatic inhabitants. In addition, human interference, pollution and uncontrolled recreational activities can introduce harmful substances into the water, threatening the purity and long-term viability of this precious resource.
Protective and sustainable practices:
We recognize the value of Lake Serenity and it is critical for us to be actively involved in conservation efforts. By adopting sustainable practices, we can ensure the longevity of this natural resource for future generations to cherish. Responsible waste management, controlled development and the promotion of ecological recreational activities are essential steps to protect the integrity of the lake. A collaborative effort involving local communities, environmental organizations and government bodies can play a key role in implementing measures to protect and preserve Lake Serenity.
Conclusion:
Lake Serenity is a testimony to the amazing wonders that nature bestows upon us. Its crystal clear waters and vibrant ecosystem are a reminder of the importance of protecting our natural resources. By appreciating and respecting this unique resource, we not only benefit personally, but also contribute to the protection of our environment. Let's accept the responsibility to protect Lake Serenity and ensure that its pristine beauty remains a source of inspiration for generations to come.
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You observe that the rate at which you eat your Halloween candy is proportional to the amount you have left. After 8 days, you have eaten ¾ of it. After two weeks, only the Jolly Ranchers and candy corn remain. What can you conclude about the kinetics of this process?
a) The half life of your candy is 4 days
b) The disappearance of your candy follows zero order kinetics
c) The half life of your candy is 2.82 days
d) The half life of your candy is inversely proportional to the amount remaining
The correct answer is (a) The half-life of your candy is 4 days.
It appears that the disappearance of your candy follows first-order kinetics. This is because the rate at which you are eating the candy is proportional to the amount you have left, which is a characteristic of first-order reactions.
We can calculate the half-life of the candy as follows: t1/2 = (ln2)/k
where t1/2 is the half-life, k is the rate constant, and ln is the natural logarithm.
Assuming that the candy is consumed completely after 14 days, we know that the remaining amount after 8 days is 1/4 of the initial amount. The fraction of candy remaining after 6 days (i.e., the half-life) is:
1/2 = (1/4)e^(-k*8)
Solving for k, we get:
k = ln(2)/8 = 0.0866 day^-1
Substituting this value for k in the half-life equation, we get:
t1/2 = (ln2)/0.0866 day^-1 ≈ 8.0 days
hence, the correct option is (a) The half-life of your candy is 4 days.
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Given the following balanced equation, determine the rate of reaction with respect to [Cl2]. If the rate of Cl2 loss is 4.60 × 10-2 M/s, what is the rate of formation of NOCl? 2 NO(g) + Cl2(g) → 2 NOCl(g)
Answer: 0.0920 M/s
Explanation: For every 1 mol of Cl2 used up, 2 mol of NOCl is produced. Thus, the rate of formation of NOCl is double the rate of Cl2 loss, which is 2*(4.60*10^-2) = 9.20*10^-2 M/s, or 0.0920 M/s.
how to convert mass into volume ( mass-volume relation)
Answer:
V=mass/Density
Explanation:
Since density is measured as grams/mL or grams/cm^3 and we are interested in converting mass to volume, we need to rewrite the equation.
Therefore, in order to convert the gram to mL, you just need to multiply the mass of the substance in grams with its density to get the volume in liters.
Answer:
Volume equals mass divided by density.
and
Mass equals density times volume.
Hope this helps :)
Pls brainliest...
MISSED THIS? Read Section
17.9 (Pages 765-769).
Consider a 0.14 M solution of a weak polyprotic
acid (H₂A) with the possible values of Kai and
K₁2 given here. Calculate the contributions to
[H3O+] from each ionization step. At what point
can the contribution of the second step be
neglected?
K₁1 = 1.0 × 10 and K₁2=1.0 x 10-6
Express your answers in molarity to two significant figures separated by a comma.
VE| ΑΣΦ 3 -C?
[H₂O₁. [H₂O] 3.7 10,6.03 101
Submit
Previous Answers Request Answer
.
M
x Incorrect; Try Again; 4 attempts remaining
You have correctly determined the contribution to [H₂O] from the first ionization step. T
determine the contribution to [H₂O] from the second ionization step, prepare an ICE ta
(where ) represents initial, C represents change, and E represents equilibrium), showing
change in the H₂O concentration with the variable y and defining the equilibrium
concentrations in terms of the concentrations produced in the first step and the variable y
Substitute these expressions into the expression for Kazi
In the formula for the equilibrium concentration of H2O, solve for y and add the answer. The difference between the equilibrium concentration of H2O and the concentration of H2O produced in the first stage is then the contribution to [H2O] from the second ionisation step.
When might the second step's contribution be disregarded? When the second step's contribution is significantly less than the first step's contribution, the second step's participation might be overlooked.
When the contribution of the second step to the contribution of the first step is much less than 1, this happens. Calculating the proportion of the second step's contribution to the first step's contribution can be used to calculate this.
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7. Propane reacts with oxygen to produce carbon dioxide and water according to
the equation pictured below.
Which of the following statements is correct?
Cz Hq +
3
*
50₂ → 3C0₂ + 4H₂O
2
O For every 4 moles of water produced, 3 moles of propane react.
O For each mole of oxygen that reacts, 3 moles of carbon dioxide are produced.
For every 3 moles of carbon dioxide produced, 5 moles of oxygen react.
O For each mole of propane that reacts, 5 moles of oxygen are produced.
According to the stoichiometry of the combustion reaction of propane for each mole of propane that reacts, 5 moles of oxygen are produced.
Stoichiometry is defined as the determination of proportions of elements or compounds which are present in a chemical reaction. The related relations are all based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances which are present in the sample.As per the chemical equation C₃H₈ +5 O₂[tex]\rightarrow[/tex]3 CO₂ + 4 H₂O.For every mole of propane that reacts, 5 moles of oxygen are produced.
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The balanced equation for the neutralization reaction of aqueous H₂SO4 with aqueous KOH is shown.
H₂SO4 (aq) + 2 KOH(aq) → 2H₂O(1) + K₂SO4 (aq)
What volume of 0.360 M KOH is needed to react completely with 10.4 mL of 0.185 M H₂SO₂?
The volume of 0.360 M KOH that is needed to neutralize 10.4 mL of 0.185 M H₂SO₄ is 10.68 ml.
Neutralization is a chemical reaction in which acid and base react to form salt and water. Hydrogen (H⁺) ions and hydroxide (OH⁻ ions) react with each other to form water.
The strong acid and strong base neutralization have a pH value of 7.
The beaker gets warm which indicates that the reaction between acid and base is an exothermic reaction releasing heat energy into the surroundings.
Given,
Concentration of KOH = 0.36M
Concentration of H₂SO₄ = 0.185M
Volume of H₂SO₄ = 10.4 ml
In the reaction, one mole of H₂SO₄ needs 2 moles of KOH
2 × Concentration of H₂SO₄ × Volume of H₂SO₄ = Concentration of KOH × Volume of KOH
2 × 0.185 × 10.4 = 0.360 × Volume of KOH
Volume of KOH = 10.68 ml
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Will a chemical reaction take place for a bar of silver being placed into a solution containing Cu2+ ions?
Yes, a chemical reaction will take place if a bar of silver is placed into a solution containing [tex]Cu^{2+}[/tex] ions.
The reaction that will occur is a type of single replacement reaction. The silver metal will react with the copper ions in the solution, causing the copper ions to be reduced and the silver metal to be oxidized. The overall balanced chemical equation for this reaction is:
Ag(s) + [tex]Cu^{2+}[/tex](aq) → Cu(s) + [tex]Ag^+[/tex](aq)
In this equation, Ag represents silver, Cu represents copper, and the (s) and (aq) notations indicate solid and aqueous states, respectively. The arrow indicates the direction of the reaction.
As a result of this reaction, a thin layer of copper metal will be deposited onto the surface of the silver bar, while silver ions will enter the solution. This reaction is often used in electroplating applications, where a layer of one metal is deposited onto the surface of another metal.
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To what temperature would 12.3g of He have to be cooled to fit a 34.0 l tank at 1.17 atm?
The ideal gas law may be used to calculate the temperature at which 12.3 g of He would need to be cooled to fit a 34.0 l tank at 1.17 atm. According to this rule, the ideal gas constant multiplied by the number of moles in the gas equals the product of an ideal gas's pressure, volume, and temperature.
In order to solve for temperature, we may thus rearrange the equation. PV = nRT, where P is for pressure, V is for volume, n is for moles, R is for the ideal gas constant, and T is for temperature, is the equation. By multiplying both sides of the equation by the inverse of P and dividing both sides by nR, we may find the value of T.This results in the formula T = PV/nR.
The values for P, V, and nR can be substituted for the predetermined conditions. The volume is 34.0 l and the pressure is 1.17 atm. By dividing the mass, 12.3 g, by He's molar mass, 4.00 g/mol, the amount of moles of He may be computed. 0.0821 L*atm/K*mol is the ideal gas constant. Plugging these values into the equation gives us a temperature of about -267.7 K.
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Which one of the following samples has the greatest mass?
0.37 mol of camphor, C10H160
4.2 mol of ammonia, NH3
9.3 mol of krypton, Kr
4.0 mol of iodine vapor, 12
1.6 mol of formaldehyde, CH₂O
To determine which sample has the greatest mass, we need to use the molar mass of each substance to calculate the mass of each sample. The molar mass is the mass of one mole of a substance, expressed in grams per mole (g/mol).
The molar mass of camphor (C10H16O) is approximately 152.23 g/mol. Therefore, 0.37 mol of camphor has a mass of:
mass = moles x molar mass = 0.37 mol x 152.23 g/mol = 56.34 g
The molar mass of ammonia (NH3) is approximately 17.03 g/mol. Therefore, 4.2 mol of ammonia has a mass of:
mass = moles x molar mass = 4.2 mol x 17.03 g/mol = 71.43 g
The molar mass of krypton (Kr) is approximately 83.80 g/mol. Therefore, 9.3 mol of krypton has a mass of:
mass = moles x molar mass = 9.3 mol x 83.80 g/mol = 779.34 g
The molar mass of iodine vapor (I2) is approximately 253.81 g/mol. Therefore, 4.0 mol of iodine vapor has a mass of:
mass = moles x molar mass = 4.0 mol x 253.81 g/mol = 1015.24 g
The molar mass of formaldehyde (CH2O) is approximately 30.03 g/mol. Therefore, 1.6 mol of formaldehyde has a mass of:
mass = moles x molar mass = 1.6 mol x 30.03 g/mol = 48.05 g
Therefore, the sample with the greatest mass is 4.0 mol of iodine vapor, which has a mass of 1015.24 g.
Answer: 4.0 mol of iodine vapor, 12
Explanation: took the test
Consider the solubilities of a particular solute at two different temperatures.
Solubility (g/100 g H₂O)
44.3
81.4
Temperature (C)
20.0
30.0
Suppose a saturated solution of this solute was made using 51.0 g H₂O at 20.0 °C. How much more solute can be added if the
temperature is increased to 30.0 °C?
If the temperature is increased to 30.0 °C, an additional 39.9 g of solute can be dissolved in the remaining water, for a total of 62.5 g solute in 100 g of water at 30.0 °C.
To solve this problem, we can use the fact that solubility generally increases with temperature. We can first find the amount of solute that has already been dissolved in the 51.0 g of water at 20.0 °C, and then calculate how much more solute can be dissolved in the additional amount of water at 30.0 °C.
From the table, we see that the solubility of the solute at 20.0 °C is 44.3 g/100 g H₂O. This means that 51.0 g of water can dissolve:
(44.3 g solute / 100 g water) × (51.0 g water) = 22.6 g solute
at 20.0 °C.
Next, we can use the solubility at 30.0 °C to find out how much more solute can be dissolved in the remaining water at this temperature. From the table, we see that the solubility of the solute at 30.0 °C is 81.4 g/100 g H₂O.
This means that 100 g of water can dissolve 81.4 g of solute at 30.0 °C. To find out how much solute can be dissolved in the remaining water at 30.0 °C, we can set up the following proportion:
(81.4 g solute / 100 g water) = (x g solute / (100 - 51) g water)
where x is the amount of solute that can be dissolved in the remaining water at 30.0 °C.
Solving for x, we get:
x = (81.4 g solute / 100 g water) × (49.0 g water) = 39.9 g solute
Therefore, if the temperature is increased to 30.0 °C, an additional 39.9 g of solute can be dissolved in the remaining water, for a total of:
22.6 g + 39.9 g = 62.5 g solute in 100 g of water at 30.0 °C.
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how much water would i need to add 500 ML of a 2.4 M KCI solution to make a 1.0 solution
Answer:700 ml
Explanation:
How much water would I need to add to 500 mL of a 2.4 M KCl solution to make a 1.0 M solution? Need to add 1200 – 500 = 700 mL.
A student would like to prepare 1 ppm Be^2+ solution from BeSO4. How many grams of BeSO4 should be weighed out to prepare 1L of the solution? (Be=9amu S = 32 amu, 0=15amu
1 mg of BeSO₄ should be weighed out to prepare 1 L of 1 ppm Be⁺² solution.
The molar mass of BeSO₄ is:
BeSO₄ = Be + S + 4O
= 9.01 + 32.06 + (4 x 15.99)
= 9.01 + 32.06 + 63.96
= 105.03 g/mol
To prepare a 1 ppm solution of BeSO₄, 1 part of BeSO₄ per million parts of the solution. Since, preparing 1 L of solution, add 1 mg of BeSO₄ to the solution:
1 ppm = 1 mg/L
The number of moles of BeSO₄ required for 1 mg is:
n = m/M
n = 0.001 g / 105.03 g/mol
n = 9.52 x 10^-6 mol
To convert moles of BeSO₄ to grams, use the molar mass:
Mass = n x M
= 9.52 x 10^-6 mol x 105.03 g/mol
= 0.001 g or 1 mg
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A compound is 60.00% carbon, 5.75% hydrogen, and 34.25% oxygen. Determine the empirical formula of the compound.
Answer:
The empirical formula of the compound is C2H5O.
(biological process in an organism that produces methane)
The biological process in an organism that produces methane is called methanogenesis.
What is methanogenesis?Methanogenesis, can as well be regarded as the biomethanation, which can be consiered as a form of anaerobic respirationwhereby there is a utilization of the carbon as the terminal electron acceptor, resulting in the production of methane.
It shoud be noted that Methanogenesis do follows the process of anaerobic respiration here there is a generation of methane as the final product of metabolism in theprocess the organic matter such as glucose is oxidized to CO2, however in hydrogenotrophic methanogenesis, H2 is oxidized to H+.
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complete qustion;
What is biological process in an organism that produces methane
A gas takes up a volume of 25 liters, has a pressure of 2.3 atm, and a temperature of 299 K.
If I raise the temperature to 325 K and lower the pressure to 1.2 atm, what is the new volume of the gas?
The new volume of the gas is 56.6 liters when the temperature is raised to 325 K and the pressure is lowered to 1.2 atm.
PV = nRT
Where R is the ideal gas constant. Since the number of moles is constant in this problem, we can simplify the ideal gas law to:
P1V1/T1 = P2V2/T2
Where the subscripts 1 and 2 refer to the initial and final states of the gas, respectively.
We can now plug in the given values for the initial state of the gas:
P1 = 2.3 atm
V1 = 25 L
T1 = 299 K
And the given values for the final state of the gas:
P2 = 1.2 atm
T2 = 325 K
We can then solve for V2:
P1V1/T1 = P2V2/T2
(2.3 atm)(25 L)/(299 K) = (1.2 atm)V2/(325 K)
V2 = (2.3 atm)(25 L)(325 K)/(1.2 atm)(299 K)
V2 = 56.6 L (rounded to three significant figures)
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Which equation best represents the net ionic equation for the reaction that occurs when aqueous solutions of
potassium phosphate and iron(II) nitrate are mixed?
3Fe2+ (aq) + 2PO4³-(aq) → Fe3(PO4)2(s)
2K+ (aq) + Fe(NO3)2(aq) → 2KNO3(aq) + Fe²+ (aq)
3Fe2+ (aq) + 2PO4³ (aq) → Fe3(PO4)2(aq)
2K3PO4(aq) + 3Fe2+ (aq) → Fe3(PO4)2(s) + (K+)6(aq)
2K3PO4(aq) + 3Fe(NO3)2(aq) → Fe3(PO4)2(s) + 6KNO3(aq)
The net ionic equation for the reaction that occurs when aqueous solutions of potassium phosphate and iron(II) nitrate are mixed is:
3Fe2+(aq) + 2PO43-(aq) → Fe3(PO4)2(s)
Therefore, the correct answer is A.
