Josh prepares a solution by mixing sodium nitrate and water. To calculate the molarity of the solution, Josh should calculate the moles of which substance, and why?sodium nitrate, because it is the solvent
sodium nitrate, because it is the solute
water, because it is the solvent
water, because it is the solute
Answers
Answer:
sodium nitrate, because it is the solute
Explanation:
To find the molarity of the solution, Josh should determine the number of moles of the sodium nitrate.
Molarity is defined as the number of moles of solutes in a given volume of solution.
Molarity =
n is the number of moles of solute
v is the volume of solution
Answer:
C: sodium nitrate, because it is the solute
Explanation:
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The standard enthalpy of formation occurs under the standard conditions of 298k and 1bar.
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Final Answer:
Three toxicants associated with sewage are heavy metals, organic pollutants, and pathogenic microorganisms.
Explanation:
1. Heavy Metals: Sewage can contain heavy metals such as lead, mercury, and cadmium, which are often discharged into wastewater from industrial processes and urban runoff. These toxic metals can contaminate water bodies, accumulate in aquatic ecosystems, and pose significant health risks to both aquatic life and humans when consumed through contaminated water or seafood.
2. Organic Pollutants:*Sewage also contains a variety of organic pollutants, including pesticides, solvents, and synthetic chemicals. These substances can originate from household products, industrial discharges, and agricultural runoff. Organic pollutants can have adverse effects on aquatic ecosystems by disrupting the balance of the ecosystem, affecting water quality, and harming aquatic organisms.
3. Pathogenic Microorganisms: Sewage is a potential carrier of pathogenic microorganisms such as bacteria, viruses, and parasites. When sewage is improperly treated or discharged into water bodies without adequate disinfection, it can lead to the contamination of drinking water sources and recreational waters, causing waterborne diseases and infections in humans.
Proper sewage treatment and wastewater management are essential to minimize the release of these toxicants into the environment and protect human health and aquatic ecosystems.
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Answer:
Pathogens,Heavy Metal and Organic Chemicals are all three toxicants associated with sewage
Answers
These negative gasses get modified and then remain in the atmosphere without the possibility of leaving, which is why the greenhouse effect occurs.
Answer;
Carbon dioxide and water
The atmosphere's variable gases that most influence the greenhouse effect are carbon dioxide and water.
Explanation;
- Green house effect is a phenomenon where the radiation from the atmosphere of the earth warms the surface of the earth to a temperature above what it would be. It occurs when the atmosphere traps heat radiating from the earth towards the space.
- Certain gases in the atmosphere block the heat from escaping, these gases are called the green house gases. These gases contribute to the green house effect, they include, water vapor which is the most abundant green house gas, carbon dioxide a very important component of the atmosphere, methane, nitrous oxide, CFCs, etc.
Answers
The answer to the riddle Maggie is solving is 6
To determine the answer to the riddle Maggie is solving,
We will subtract the number of valence electrons in halogens by the number of valence electrons in alkali metals.
First, let us define what is meant by valence electrons
Valence electrons are those electrons that reside in the outermost shell surrounding an atomic nucleus.
Now, we will the determine the respective number of valence electrons in halogens as well as the number of valence electrons in alkali metals.
For Halogens
Halogens are the group 17 (group 7A) elements in the periodic table. Examples are Fluorine, Chlorine, Bromine etc.
Halogens have 7 electrons in their outermost shell
For Alkali metals
Alkali metals are the group 1 metals. Examples are Lithium, Sodium, Potassium etc.
Alkali metals have 1 electron in their outermost shell
Now, for the answer to the riddle,
Answer to the riddle = Number of valence electrons in halogens - Number of valence electrons in Alkali metals
\
Answer to the riddle = 7 - 1
∴ Answer to the riddle = 6
Hence, the answer to the riddle Maggie is solving is 6
Learn more here: brainly.com/question/9392364
Answers
Answer:
69.3%
Explanation:
The question should read as follows:
A weak acid, HA, has a pKa of 4.357. If a solution of this acid has a pH of 4.005, what percentage of the acid is not ionized? Assume all H⁺ in the solution came from the ionization of HA.
The Henderson-Hasselbalch equation relates the pKa and pH of a solution to the ratio of ionized (A⁻) and unionized (HA) forms of a weak acid:
pH = pKa + log ([A⁻]/[HA])
Substituting and solving for [A⁻]/[HA]:
4.005 = 4.3574 = log([A⁻]/[HA])
-0.3524 = log([A⁻]/[HA])
[A⁻]/[HA] = 0.444/1
The percentage of acid that is not ionized (i.e. the percentage of acid in the HA form) is calculated:
[HA]/([A⁻] + [HA]) x 100% = 1/(1+0.444) x 100% = 69.3%
Answers
Answer : The moles ratio between the nitrogen gas and hydrogen gas are, 1 : 3 respectively.
Explanation :
The balanced chemical reaction will be,
Mole ratio : It is defined as the ratio of the number of moles of the substances whose ratio is to be calculated.
In a chemical reaction, the stoichiometric coefficients represents the number of moles.
By stoichiometry of the reaction we can say that,
1 mole of nitrogen gas reacts with 3 moles of hydrogen gas to produce 2 moles of ammonia gas.
Hence, the mole ratio of between the nitrogen gas and hydrogen gas are, 1 : 3 respectively.
For instance you have a chemical reaction of N2 + 3H2 -> 2NH3. The number of moles of N2 is 1, H2 is 3 and NH3 is 2. The mole to mole ratio between nitrogen gas and hydrogen gas is 1/3 or 1 is to 3.