<span>I would say : B ) Equilibrium always happens at the same point in the reaction no matter where you start.
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Answer: oprion <span>A. Catalysts can only increase the rate of reaction for compounds that do react.
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Explanation:
Such as the right choice states a catalyst cannot make react two materials that cannot chemically react.
The catalysts modify the rate (speed) of a reaction between chemicals.
The definition of catalyst is a substance that increases the speed of a chemical reaction by modifying the activation energy but that is not consumed in the reaction.
Then three facts must be highlithed about catalyst:
1) Catalysts are not included in the chemical equation since they do not increase the amount of product that can be obtained (they do not change the theoretical yield of the reaction).
2) Catalysts change the path that the reactants take to yield the products, which is how the energy activation is changed.
3) As consequence, catalysts are not consumed during the reaction.
Answer:
<u>Mass concentration (g/L) </u><u><em>= 2.49g/L.</em></u>
Explanation:
No. of moles =
= = 0.001245 moles
Concentration of KHP (C1) in litres = n/v
= = 0.062 mol/L
We know that:
=
where c1v1 and c2v2 are the products of concentration and volumes of KHP and NaOH respectively.
Since mole ratio is 1 : 1.
1 mole of NaOH - 40g
0.001245 mole of NaOH = 40 × 0.001245 = 0.0498g
⇒0.0498g of NaOH was used during the titration
<u><em>∴Mass concentration (g/L) = 0.0498g ÷ 0.02L</em></u>
<u><em>= 2.49g/L.</em></u>
1.09 Liters
The total volume of the solution formed is 1.093 L
We know that,
Ca(OH)2 = 74 g/mole
n = 55/74 = 0.743 mole
M = n/V
where,
M = mass of the solution
n = number of moles
V = Volume of solution
0.680 = 0.743 / V
V = 0.743/0.680
= 1.093 L
= 1093 ml
Therefore, the total volume of the solution formed is 1.093 L
<h3>What is molarity?</h3>
- The amount of a substance in a specific volume of solution is known as its molarity (M).
- The number of moles of a solute per liter of a solution is known as molarity.
- The molar concentration of a solution is another name for molarity.
<h3>What is the molarity unit?</h3>
- Molarity is measured in mol/L.
- The molarity, which is given as moles/liter, is the quantity of moles of solute per liter of the solution.
<h3>Example of molarity:</h3>
- The moles of solute per liter of solution is measured as molarity.
- For instance, when table salt is dissolved in water, water serves as both the solution and the solute.
- Sodium chloride weights 58.44 grams per mole.
- One molar solution, or 1M, is created by dissolving 58.44 grams of sodium chloride in one liter of water.
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The answer should be chloride and sodium