Nitrogen in calcium nitrate Ca (No3) 2 and in a sample weighing 50 tons.

1.Let’s find the mass of a mole of calcium nitrate – Ca (NO3) 2:

40 + 2 * (14 +3 * 16) = 164 g.

2. Determine the mass of nitrogen in the composition of this salt. This is 14 * 2 = 28 g.

3. We make up the proportion and solve the equation:

164 g of salt contains 28 g of nitrogen

50 t – x.

Here, tons in grams can be omitted, as grams will be reduced.

x = 50 * 28/164;

x = 8.54 t.

Answer: calcium nitrate weighing 50 tons contains 8.54 tons of nitrogen.