In equal weights of 1 g, the largest number of atoms contains the substance: table salt

In equal weights of 1 g, the largest number of atoms contains the substance: table salt, carbon monoxide, carbon dioxide, water.

N = n Na, where N is the number of atoms, n is the amount of substance, Na is Avogadro’s number, 6 × 10 ^ 23.

Table salt NaCl. Carbon monoxide CO. Carbon dioxide CO2.

1) Let’s calculate the molar masses of these substances.

M (NaCl) = 23 + 35 = 58 g / mol.

M (CO) = 12 + 16 = 28 g / mol.

M (CO2) = 12 + 16 × 2 = 44 g / mol.

M (H2O) = 1 × 2 + 16 = 18 g / mol.

2) Calculate the amount of substance according to the formula:

n = m: M.

n (NaCl) = 1g: 58 g / mol = 0.017 mol;

n (CO) = 1: 28 g / mol = 0.0357 mol.

n (CO2) = 1: 44 g / mol = 0.0227 mol.

n (H2O) = 1: 18 g / mol = 0.0556 mol.

3) Find the number of atoms by the formula:

N (NaCl) = 0.017 × 6 × 10 ^ 23 = 0.1 × 10 ^ 23;

N (CO) = 0.0357 × 6 × 10 ^ 23 = 0.21 × 10 ^ 23;

N (CO2) = 0.0227 × 6 × 10 ^ 23 = 0.1362 × 10 ^ 23;

N (H2O) = 0.0556 × 6 × 10 ^ 23 = 0.3336 × 10 ^ 23.

Answer: the largest number of atoms is found in water

N (H2O) = 0.3336 × 10 ^ 23.