Question

1. What is the mass in grams of each of the following?
(a) 1.0 mole of Cu
(b) 0.5 mole of s
(c) 6.023 x 1023 atoms of Ca
answer all part ​

Answer 1

Answer:

a) 63 grams

b) 16 grams

c) 40 grams

Explanation:

a) 1 mole of Cu atoms contain 6.023*10^23 atoms of Cu. hence molar mass of Cu is 63 grams

b) 1 mole of S contains 6.023*10^23 atoms of S which is 32 grams. here half mole is given

Mass=Number of moles*molar mass

=.5*32

=16 grams

c) here given particles are 6.023*10^23 and to get moles we apply this formula

No. of moles=Given particles/Total particles in one mole.

=6.023*10^23/6.023*10^23

=1 mole

and one mole of Ca is 40 grams.

Hope it helped you