Question

Chalk contains 10% calcium, 3% carbon, 12% oxygen and the remaining is sand.
Calculate the amount of calcium, carbon, oxygen and sand in 4 Kgs of chalk. Express all
the answers in grams.

Answer 1

Step-by-step explanation:

In chalk,

Calcium=10%

Carbon=3%

Oxygen=12%

Remaining=100−(10+3+12)=100−25=75%

Sand=75%

Weight of chalk =2

2

1

=

2

5

kg

Amount of carbon =

2

5

×

100

3

=

40

3

kg

=

40

3

×1000=75grams

Amount of calcium =

2

5

×

100

10

=

4

1

kg

=250grams

and amount of sand =

2

5

×

100

75

=

8

15

kg

=

8

15

=1.875kg