# How do you calculate moles consumed in a reaction?

Contents

## How many moles of oxygen are consumed?

If, or when, hydrogen reacts with oxygen, two molecules of hydrogen and one molecule of oxygen are consumed for every two molecules of water produced. If, or when, hydrogen reacts with oxygen, two moles of hydrogen and one mole of oxygen are consumed for every two moles of water produced.

## How do you calculate the mass of a reactant consumed?

Worked Example of Using Mole Ratio to Calculate Mass of Reactant or Product

1. mass O2 = moles(O2) × molar mass(O2) (a) Calculate moles(Mg) = mass(Mg) ÷ molar mass(Mg) moles(Mg) = 12.2 ÷ 24.31 = 0.50 mol. …
2. mass MgO = moles(MgO) × molar mass(MgO) (a) Calculate moles Mg. moles(Mg) = mass(Mg) ÷ molar mass(Mg)

## When 12 moles of O2 reacts with 6 moles of c10h8 What is the limiting reactant 1 c10h8 12 O2 –> 10 co2 4 H2O?

Explanation: it is so bcz 1 mole of C10H8O must requires 12 moles of o2 so 6 moles must require 6*12 which is 72 moles. so o2 is limiting reagant.

## How many moles of oxygen are consumed during the complete combustion of one mole of ethanol?

So for every mole of ethanol we need three moles of oxygen.

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## How do you find the moles of a product formed?

In order to calculate the moles of a product, you must know the mass of the product, and its molar mass (g/mol), which is the mass of one mole of of the product. You then divide the mass of the product by its molar mass.

## How do you calculate the moles of a compound?

Divide the mass of the compound in grams by the molar mass you just calculated. The answer is the number of moles of that mass of compound. For example, 25 grams of water equals 25/18.016 or 1.39 moles.