Question

The balanced chemical equation for the reaction of hydrogen and oxygen is shown below. 2H2 + O2 mc002-1.jpg 2H2O The number of moles of hydrogen that is needed to produce 0.253 mol of water is

Answer 1

Here is the correct answer

Answer 2

The required Balanced chemical equation is :

2H2 + O2 -----> 2H2O

atomic mass of H-1 u

atomic mass of O-16u

molecular mass of Oxygen=32u

molar mass of O2=32g

Molecular mass of Hydrogen= 2u

molar mass of hydrogen=2g

water molar mass=18g

so 2H2 + O2 -----> 2H2O

2x2g of Hydrogen + 32g of O2 ----> 2x 18g of water

2moles of hydrogen reacts with 1 mole of oxygen to produce 2 moles of water

2moles of hydrogen --------> 2 moles of water

X? ----------------------> 0.253mol of water

= 2x0.253/2=0.253 mol of water

∴ The number of moles of hydrogen that is needed to produce 0.253 mol of water is 0.253 mol