Question

Calculate the percent nitrogen in Cu(NO3)2. Round your answer to the closest whole number.

A) 14%
B) 25%
C) 33%
D) 50%

Answer 1

To calculate the percent nitrogen in Cu(NO3)2, find the molar mass of Cu(NO3)2 and nitrogen. Divide the molar mass of nitrogen by the molar mass of Cu(NO3)2 and multiply by 100. Round the answer to the closest whole number.

Step-by-step explanation:

To calculate the percent nitrogen in Cu(NO3)2, we need to find the molar mass of Cu(NO3)2 and the molar mass of nitrogen.

The molar mass of Cu(NO3)2 is 63.55 + 2(14.01 + 3(16.00)) = 187.55 g/mol.

The molar mass of nitrogen is 14.01 g/mol.

To find the percent nitrogen, we divide the molar mass of nitrogen by the molar mass of Cu(NO3)2 and multiply by 100.

Percent nitrogen = (14.01 g/mol / 187.55 g/mol) * 100 = 7.47%.

Rounding to the closest whole number, the percent nitrogen in Cu(NO3)2 is 7%.