Question

Calculate the number of grams of water produced from 30 g of oxygen gas. List only the number of grams of water. First, you will need to balance the equation above. Round to the nearest hundredth. And, as always, don't forget the units.

Answer 1

34 g of water, will be produced

Step-by-step explanation:

The balanced equation for production of water with oxygen is:

2H₂ (g) + O₂ (g) → 2H₂O (l)

2 mol of hydrgen gas react with 1 mol of oxygen to produce 2 moles of water.

Let's determine the moles of O₂ (mass / molar mass)

30 g / 32g/mol = 0.9375 moles

Ratio is 1:2. So If I have x moles of oxygen I would produce the double of moles of water.

0.9375 moles . 2 = 1.875 moles

Let's convert the moles to mass ( mol . molar mass)

1.875 mol . 18g/mol = 33.75 g ≅ 34 g