Math  /  Word Problems

QuestionCalculate the moles of oxygen needed for 1.8 mol of carbon dioxide from burning octane (C8H18)\left(\mathrm{C}_{8} \mathrm{H}_{18}\right).

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Question: If the calculated value of x is 2.8125, what would be the value of x rounded to the correct number of significant digits?
A) 2.81 B) 2.812 C) 2.8 D) 3
Answer: C) 2.8

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