How many molecules are contained in carbon dioxide with a mass of 1 g.

m = 1 g
N -?
In order to find the number of molecules, the mass must be divided by the mass of one molecule N = m / m0. Let’s find the mass of one carbon dioxide molecule. The formula for carbon dioxide is CO2, so the molar mass of M will be 12 + 16 * 2 = 44 g / mol. m0 = M / Na, where Na = 6 * 10 ^ 23. m0 = M / Na = 44 g / mol / 6 * 10 ^ 23 = 0.7333 * 10 ^ -23 g. N = m / m0 = 1 / 0.7333 * 10 ^ -23 = 1.3636 * 10 ^ 23 pieces.
Answer: 1 g of carbon dioxide contains 1.3636 * 10 ^ 23 molecules.