Weight of the coal is 2g and after heating the coal sample, the weight of the coal is 1.82g. What is the % of the moisture in coal?(a) 20%(b) 9%(c) 10%(d) 30%I had been asked this question by my college professor while I was bunking the class.I'm obligated to ask this question of Analysis of Coal and Selection topic in chapter Fuel Technologies of Applied Chemistry

Weight of the coal is 2g and after heating the coal sample, the weight

1.	Weight of the coal is 2g and after heating the coal sample, the weight of the coal is 1.82g. What is the % of the moisture in coal?(a) 20%(b) 9%(c) 10%(d) 30%I had been asked this question by my college professor while I was bunking the class.I'm obligated to ask this question of Analysis of Coal and Selection topic in chapter Fuel Technologies of Applied Chemistry
Answer» Correct answer is (b) 9% To elaborate: We know that % of MOISTURE=[(w1-w2)/weight of coal]100, where w1=weight of the coal sample, w2=weight of the coal after HEATING. After substituting the given VALUES in the formula, you’ll get 9% as an answer. Here’s the CALCULATION step-by-step: ((2 – 1.82) / 2) 100 ==> (0.18/2) * 100 ==> 0.09 * 100 ==> 9%

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