Question

1. Calculate the number of moles in 5.72 x 10^20 molecules of CO

2. Calculate the number of atoms in 1.20 moles of sulfur

3. Calculate the molar mass of Al2(SO4)3

Calculate in the mass in grams of 3.00 moles Ca

Answer 1

Answer:5.72 g ( 1 mol / 180.16 g ) ( 6.022 x 10^23 molecules / mole ) = 1.90x10^23 molecules

Explanation: number of moles is avagadros number

Answer 2

Answer: Avogadro's number represents the number of units in one mole of any substance. This has the value of 6.022 x 10^23 units / mole. This number can be used to convert the number of atoms or molecules into number of moles. We do as follows:

5.72 g ( 1 mol / 180.16 g ) ( 6.022 x 10^23 molecules / mole ) = 1.90x10^23 molecules

Step-by-step explanation: