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vekshin1
3 years ago
11

In this reaction, what is the correct coefficient for oxygen gas? ? h2 (g) + ? o2 (g)→ ? h2o(g)

Chemistry
1 answer:
denis-greek [22]3 years ago
7 0

Answer:

1 O₂

Explanation:

In the combustion reaction of hydrogen, oxygen combines with hydrogen to form water as the product of the reaction

Equation of reaction:

2H₂ + O₂ → 2H₂O

From the equation of reaction, it is evident that 2 moles of hydrogen reacts with 1 mole of oxygen to produce 2 moles of water.

Therefore the coefficient of oxygen in the equation is 1.

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Answer:

7.32g of HNO3 are required.

Explanation:

1st) From the balanced reaction we know that 2 moles of HNO3 react with 1 mole of Ca(OH)2 to produce 2 moles of H2O and 1 mole of Ca(NO3)2.

From this, we find that the relation between HNO3 and Ca(OH)2 is that 2 moles of HNO3 react with 1 mole of Ca(OH)2.

2nd) This is the order of the relations that we have to use in the equation to calculate the grams of nitric acid:

• starting with the 4.30 grams of Ca(OH)2.

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• using the molar mass of Ca(OH)2 (74g/mol).

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• relation of the 2 moles of HNO3 that react with 1 mole of Ca(OH)2 .

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• using the molar mass of HNO3 (63.02g/mol).

4.30g\text{ Ca\lparen OH\rparen}_2*\frac{1\text{ mol Ca\lparen OH\rparen}_2}{74g\text{ Ca\lparen OH\rparen}_2}*\frac{2\text{ moles HNO}_3}{1\text{ mole Ca\lparen OH\rparen}_2}*\frac{63.02g\text{ HNO}_3}{1\text{ mole HNO}_3}=7.32g\text{ HNO}_3

So, 7.32g of HNO3 are required.

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