Question

(a) How many grams of chlorine are contained in one mole of chlorine? (Gram atomic

mass of Chlorine = 35.5 g)

(b) How many molecules are there in 1 g of chlorine?​

Answer 1

Answer:

(a) grams of chlorine in one mole = 35.5 g

(b) molecules of chlorine in 1 g of chlorine = 0.169 X 10²³ molecules

Explanation:

Given

Gram atomic  mass of Chlorine = 35.5 g/mol

grams of chlorine in one mole = ??

molecules of chlorine in 1 g of chlorine = ??

Solution

(a) as we know that

No. of Moles =  mass in grams/ Atomic mass

by putting values

1 mol = mass in grams/ 35.5

mass in grams = 35.5 g

grams of chlorine in one mole = 35.5 g

(b) first need to calculate moles

No. of Moles = 1 g / 35.5 g/mol

No. of Moles = 0.0281 mol

Number of molecules = No. of Moles  X Avogadro's number

Number of molecules = 0.0281 X 6.022 X 10²³

Number of molecules = 0.169 X 10²³ molecules

molecules of chlorine in 1 g of chlorine = 0.169 X 10²³ molecules

Answer 2

Answer:

One mole of chlorine weighs 70 grams

1.72 x 10^22  molecules are present in 1g of chlorine.