Question

chalk contains 10 percent calcium, 3 percent carbon and 12 percent oxygen. Find the amount of carbon and calcium ( in grams ) in 5/2 kg of chalk​

Answer 1

Answer:

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

Step-by-step explanation:

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Answer 2

Answer:

6.25 and 1. 875

Step-by-step explanation:

Percentage of calcium - 10%

Percentage of carbon - 3%

Percentage of oxygen - 12%

Therefore, total amount ingredients in the chalk

= 10 + 3 + 12

= 25

So,

5/2 percentage of 25

= 62. 5

So, percentage of calcium = 10%

10% of 62. 5

= 6. 25

and,

Percentage of calcium = 3%

3% of 62.5

= 1.875