Calculate how many grams of each product are formed when 4.05g of h2o is used. 2h2o=2h2+o2

Given dа ta:

Mass of water used = 4.05 g

Mass of each product produced = ?

Solution:

Chemical equation:

2H₂O → 2H₂ + O₂

Number of moles of water:

Number of moles = mass / molar mass

Number of moles = 4.05 g / 18 g/mol

Number of moles = 0.225 mol

Now we will compare the moles of water with hydrogen and oxygen.

H₂O : H₂

2 : 2

0.225 : 0.225

H₂O : O₂

2 : 1

0.225 : 1/2*0.225 = 0.113 mol

Mass of hydrogen:

Mass = number of moles * molar mass

Mass = 0.225 * 2 g/mol

Mass = 0.45 g

Mass of oxygen:

Mass = number of moles * molar mass

Mass = 0.113 mol * 32 g/mol

Mass = 3.616 g