How much water, in grams, can be made from 4.12 * 1024 hydrogen molecules?

1. 195.858

2. 244.898

3. 44.554

4. 159.378

5. 93.8924

6. 170.143

7. 35.2844

8. 123.196

9. 220.677

10. 72.961

The answer is actually 4218.88 molecules.

Option 8. 123.192g

Explanation:

From Avogadro's hypothesis, 1mole of any substance contains 6.02x10^23 molecules. Therefore 1mole of H2 contains 6.02x10^23 molecules.

1mole of H2 = 2x1 = 2g

If 1 mole (i. e 2g) of H2 contains 6.02x10^23 molecules,

Then Xg of H2 will contain 4.12 * 10^24 molecules i. e

Xg of H2 =

(2x4.12 * 10^24) / 6.02x10^23 = 13.688g.

Now let us generate a balanced equation for the reaction between of Hydrogen to produce water:

2H2 + O2 - > 2H2O

Molar Mass of H2 = 2g/mol

Mass of H2 from the balanced equation = 2 x 2 = 4g

Molar Mass of H20 = (2x1) + 16 = 18g/mol

Mass of H2O from the balanced equation = 2 x 18 = 36g.

From the equation,

4g of H2 produced 36g of H2O.

Therefore, 13.688g of H2 will produce = (13.688x36) / 4 = 123.192g of H2O