Question

Calculate the percentage composition of the elements present in magnesium carbonate. How many kilogram of co2 can be obtained by heating 1kg of 90percent pure magnesium carbonate

Answer 1

Answer:

HARD

Share

Study later

VIDEO EXPLANATION

ANSWER

MgCO

3

→MgO+CO

2

The molar masses of MgCO

3

and MgO are 24+12+48=84 g/mol and 24+16=40 g/mol respectively.

Thus, 8 g MgO will be obtained from

40

84

×8=16.8 mg of MgCO

3

.

The percentage purity of magnesium carbonate in the sample is

20

16.8

×100=80%