Question

what is the mass of water when 4 gram h2 and 64 gram o2 combine

Answer 1

Answer:

Explanation:

2H2 + O2 ==>2 H2O

Moles of O2 ==> 64/32=2 mole

Since 1 mole of O2 gives 2 moles of water

Then 2 moles of O2 will give 4 mole of water.

Mole of water ==> mass/ molar mass

4 × 18 = mass of water formed

So mass of water formed is 72 grams.