Question

How many grams are in 2x10^24 formula Units of CaCO3

Answer 1

332g

Step-by-step explanation:

Given parameters:

Formula units = 2 x 10²⁴

Unknown:

Mass of the compound = ?

Solution:

The formula of the compound is:

CaCO₃

6.02 x 10²³ atoms are contained in 1 mole of a compound

2 x 10²⁴ atoms will be made up of
`(2 x 10^(24) )/(6.02 x 10^(23) )` = 3.32mole of CaCO₃

Mass of CaCO₃ = number of moles x molar mass

Molar mass of CaCO₃ = 40 + 12 + 3(16) = 100g/mol

Mass of CaCO₃ = 3.32 x 100 = 332g