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Karo-lina-s [1.5K]
4 years ago
7

Choose the element that IS NOT in the same period as Potassium.

Chemistry
1 answer:
Lesechka [4]4 years ago
8 0
E. sodium is the answer

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When iodobenzene codistills with water at 760 toor, the boiling point of the mixture is 98.5. the vapor pressure of water is?
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If all the matter in the universe was birthed seconds after the Big Bang, then what was likely triggered the bang?
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3 years ago
Describe a situation when a lever has potential energy ?
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7 0
3 years ago
Use the following reaction: C4H9OH NaBr H2SO4 C4H9Br NaHSO4 H2O If 15.0 g of C4H9OH react with 22.4 g of NaBr and 32.7 g of H2SO
ohaa [14]

Answer:

Percent yield = 61.58%

Explanation:

C4H9OH + NaBr + H2SO4 --> C4H9Br + NaHSO4 + H2O

From the reaction;

1  mol of C4H9OH reacts with 1 mol of NaBr and 1 mol of H2SO4 to form 1 mol of  C4H9Br

We have to obtain the limiting reagent. We do this by calculatig the mols of each reactant in the reaction;

Number of moles = Mass / Molar mass

C4H9OH; 15 / 74g/mol = 0.2027

NaBr; 22.4 / 102.89 = 0.2177

H2SO4; 32.7 / 98 = 0.3336

In this case, the limiting reagent is C4H9OH, it determines the amount of product formed.

From the stoichometry of the reaction; one mole of C4H9OH forms one mole of C4H9Br. This means 0.2027 mol of C4H9Br was formed.

Mass = Number of moles * Molar mass

Mass of C4H9Br formed = 0.2027 * 137

Mass = 27.77g

Percent yield =  (Practical yield /  theoretical yeield ) * 100%

Percent Yield = 17.1 / 27.77 * 100

Percent yield = 61.58%

8 0
3 years ago
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