The largest number of non-metal atoms is contained in 5 g: A) NaCl B) K2SO4 B) H2O D) HNO3

We calculate the number of atoms of non-metals, which is contained in these compounds.
For this we use the following formula: N = n × Na,
Where N is the number of molecules;
Na is Avogadro’s number, which is constant and equals 6.022 × 10 ^ 23 mol ^ -1;
n is the amount of substance that is found according to the following formula.
n = m / M;
Where m is the mass of the substance;
M is the molar mass.
Find the number of sodium chloride molecules.
n (NaCl) = 5 / 58.5 = 0.09 mol;
N = 0.09 x 6.02 x 10 ^ 23 mol ^ -1 = 0.5418 x 10 ^ 23 mol ^ -1;
Find the number of potassium sulfate molecules.
n (K2SO4) = 5/174 = 0.03 mol;
N = 0.03 x 5 x Na = 0.15 x Na n (H2O) = 5/18 = 0.3 mol;
N = 0.3 x 3 = 0.9 x Na = 0.9 x 6.02 x 10 ^ 23 mol ^ -1 = 5.418 x 10 ^ 23 mol ^ -1.
Find the number of non-metal molecules in nitric acid.
n (HNO3) = 5/63 = 0.08 mol;
N = 0.08 × 5 = 0.4 × 6.02 × 10 ^ 23 mol ^ -1 = 2.408 × 10 ^ 23 mol ^ -1.
Answer: the correct answer is в, Н2О.