## 1. How many moles are in 4.5 x 1022 atoms of Cu? 2. How many moles are in 8.5 x 1024 molecules of Nz? 3.

Question

1. How many moles are in 4.5 x 1022 atoms of Cu?

2. How many moles are in 8.5 x 1024 molecules of Nz?

3. How many molecules are in 0.025 moles of CH4?

4. How many atoms are contained in 1.26 moles of Pb?

5. How many molecules are in 0.56 moles of CO2?

in progress 0
5 months 2021-08-10T21:04:00+00:00 1 Answers 23 views 0

## Answers ( )

Know this

(i) 1mole of a substance contains 6.022 x 10^23atoms

(ii) 1mole of a substance contains 6.022×10^23molecules

Now

1.) 4.5×10²²atoms of Cu x 1mole of Cu/6.022×10²³atoms of Cu

=0.075moles of Cu.

2.) 8.5×10²⁴molecules of N2 x 1mole of N2/6.022×10²³molecules

=14.11moles of N2

3.) 0.025moles of CH4 x 6.022×10²³molecules/1mole of CH4

=1.51×10²²molecules of CH4

4.)1.26moles of Pb x 6.022×10²³atoms/1mole of Pb

=7.59×10²³atoms of Pb

5.) 0.56moles of CO2 x 6.022×10²³molecules/1mole

=3.37×10²³molecules.

That’s pretty Much Everything