Answered: A substance is 10% carbon by mass. If…

A substance is 10% carbon by mass. If the total mass of substance is 25 grams, (a) what is the mass of carbon in the sample; (b) How many moles of carbon are there?

Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter3: Equation, The Mole, And Chemical Formulas

Section: Chapter Questions

Problem 3.99QE

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Concept explainers

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.

Question

A substance is 10% carbon by mass. If the total mass of
substance is 25 grams,
(a) what is the mass of carbon in the sample;
(b) How many moles of carbon are there?

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