Question

ii) chalk contains calcium carbonandoxygen in the ratio l0 : 3:12. Find the percentage of . carbor inchalk ​

Answer 1

Answer:

It contains 12% of carbon.

Step-by-step explanation:

sum of all ratios=10+3+12=25

now fraction of carbon=3/25

percentage of carbon=3/25*100%

=3*4%

=12% and hence answer is 12%

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