Question

*86. a 2.00 - kg sample of bituminous coal is composed of 1.30 kg of carbon, 0.20 kg of ash, 0.15 kg of water, and 0.35 kg of volatile (gas - forming) material. using this information, determine how many kilograms of carbon are in 125 kg of this coal.

Explanation:

Step1: Calculate the proportion of carbon in the sample

The proportion of carbon in the 2.00 - kg sample is $\frac{1.30}{2.00}$.

Step2: Find the amount of carbon in 125 kg of coal

Multiply the proportion by 125 kg. So the amount of carbon is $\frac{1.30}{2.00}\times125$.
$=\frac{1.30\times125}{2.00}=\frac{162.5}{2}=81.25$ kg.

Answer:

81.25 kg