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anastassius [24]
2 years ago
11

12.4 g of phosphorus reacts with 9.6 g of oxygen.

Chemistry
1 answer:
vaieri [72.5K]2 years ago
7 0

Answer:

D 4P +3O₂ → 2 P₂O₃

Explanation:

In this problem, we need to convert the mass of phosphorus and oxygen to moles trying to find the ratio of reaction (The moles of P that reacts per mole of O₂):

<em>Moles P:</em>

12.4g P * (1mol P / 31g) = 0.4 moles

<em>Moles O₂:</em>

9.6g * (1mol / 32g) = 0.3 moles

The ratio of reaction is:

0.4 mol / 0.3 mol = 1.33 = 4 moles of P / 3 moles of O₂

That means 4 moles of P react with 3 moles of O₂ and the reaction that represents this ratio is:

<h3>D 4P +3O₂ → 2 P₂O₃</h3>

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The percent yield of the calcium hydroxide is 84.5%.

<h3>What is stoichiometry?</h3>

Stoichiometry enables us to obtain the mass of a substance form the equation of the reaction.

The equation of the reaction is;

CaCO3 + 2HCl -----> CaCl2 + CO2 + H2O

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Number of moles of HCl = 850/1000 * 1 M = 0.85 moles

If 1 mole of CaCO3 reacts with 2 moles of HCl

0.4 moles of  CaCO3 reacts with  0.4 moles  * 2 moles/1 mole

= 0.8 moles of HCl

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The reaction is 1:1 then the amount of CO2  produced is 0.4 moles

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2) The reaction equation is; 2NaOH + CaCO3 --->  Ca(OH)2 + Na2CO3

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If 1 mole of X reacts with 2 moles of NaOH

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Percent yield = 2.5 g/ 2.96  g * 100

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Learn ore about percent yield:brainly.com/question/17042787

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