Calculate the mass of sulfuric acid that can be obtained from sulfur oxide (valency 5) weighing 160 grams.

The first thing you need to know is that sulfur oxide (valence V) does not exist. Sulfuric acid is obtained from sulfur oxide (with a valence of VI). Its formula is SO3.

1) Let’s write the equation for the reaction of obtaining sulfuric acid from sulfur oxide (VI) and sign all known values:

SO3 + H2O -> H2SO4.

2) Now you can calculate the mass of sulfuric acid formed during the reaction. Let’s make the proportion:

160 g – 80;

x g – 98.

We calculate the mass of sulfuric acid, according to the rule for solving the proportion:

x = 160 * 98: 80 = 196 (g).