How many grams of water will be obtained by combining 2 grams of hydrogen with oxygen?

Solution:

1. Let’s compose the equation of the reaction of interaction of hydrogen with oxygen:

2H2 + O2 = 2H2O;

1. The molecular weight of hydrogen is 2 g / mol. Let’s find the amount of substance in hydrogen:

2/2 = 1 mol;

1. Let’s find the molecular weight of water:

2 * 1 + 16 = 18 g / mol;

1. There is the same coefficient in front of water as in front of hydrogen. This means that the amount of substance in water is 1 mole. Let’s find the mass of water:

18 * 1 = 18 grams;

Answer: the mass of the resulting water is 18 grams.