Question

Calculate the number of cao molecules in 2.8g of quicklime

Answer 1

Hi, please consider the answer given below;

Please follow the calculations

First calculate the number of moles = mass/molar mass

Moles = 2.8/56

moles = 0.05 moles

So therefore we can say that; 1 mole = 6.022x10^23 molecules

                                                  0.005 moles=

=0.005 x (6.022x10^23)

= 3.011 x 10^22 molecules

I hope it helps.