Question

calculate the following
1. 5 moles of sodium atoms
2. number of moles in 110 grams of Co2(carbon dioxide)

Answer 1

1,

    Sodium - 22.990 or 23g

    Then 5 mole hav , 23* 5 = 115g.

2,

     Carbon- 12g

      Oxygen - 16g

Carbon+ 2(oxygen)= 12+2(16)=44g

  1mol of CO2 have 44g.

No. Of moles in 110g = (110g) ÷ (44g)

                                  =  2.5 moles