Question

2 grams of hydrogen combined with 20 grams of oxygen. The amount of water formed is?​

Answer 1

Step-by-step explanation:

2H2 + O2 > 2H2O

4 g + 32 g = 36 g

So hydrogen and oxygen react in a ratio of 4: 32 or 1:8 by mass.

So 2 g of Oxygen will combine with 2/8 or 0.25 g of hydrogen to produce 2.25 g of water and 2 — 0.25 = 1.75 hydrogen will remain unreacted .