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Chemistry library

Course: Chemistry library > Unit 5

Lesson 2: Stoichiometry
Science
Chemistry library
Chemical reactions and stoichiometry
Stoichiometry
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Converting moles and mass

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Problem

The molecular weight of sodium chloride, start text, N, a, C, l, end text, is 58, point, 44, start fraction, start text, g, end text, divided by, start text, m, o, l, end text, end fraction.
How many moles of salt are in 13, point, 8, start text, g, end text of sodium chloride?
Express the answer using 3 significant figures.
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, start text, p, i, end text or 2, slash, 3, space, start text, p, i, end text
start text, m, o, l, end text
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