Question

# Consider the following reaction: 4 NH3 + 5O2   ->   4NO   +   6 H2O How many moles...

Consider the following reaction:

4 NH3 + 5O2   ->   4NO   +   6 H2O

How many moles of O2 are needed to react with 4.2 mol NH3?

How many moles of H2O can be produced from 1.34 mol O2?

How many grams of NH3 will react with 43.4 g O2?

How many grams of O2 are needed to produce 56 g NO?

How many moles of O2 are needed to react with 4.2 mol NH3?

From given equation,

Mol of O2 = (5/4)* mol of NH3

= (5/4)*4.2

= 5.25 mol

How many moles of H2O can be produced from 1.34 mol O2?

From given equation,

Mol of H2O = (6/5)* mol of O2

= (6/5)*1.34

= 1.61 mol

How many grams of NH3 will react with 43.4 g O2?

Mol of O2 = mass of O2 / molar mass of O2

= 43.4/32

= 1.356 mol

From given equation,

Mol of NH3 = (4/5)*mol of O2

= (4/5)*1.356

= 1.085 mol

Mass of NH3 = mol of NH3 * molar mass of NH3

= 1.085 mol * 17 g/mol

= 18.4 g

How many grams of O2 are needed to produce 56 g NO?

Mol of NO = mass/molar mass

= 56/30

= 1.87 mol

According to given equation,

Mol of O2 = (5/4)* mol of NO

= (5/4)*1.87

= 2.33 mol

Mass of O2 = number of mol * molar mass

= 2.33 * 32

= 74.7 g

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