Easy Chemistry Step-by-Step by Marian DeWane

Author:Marian DeWane
Language: eng
Format: epub
Publisher: McGraw Hill LLC
Published: 2014-03-15T00:00:00+00:00

Step 6. Ensure the percentages add up to 100. 69.94% + 30.06% = 100%

b. 58.92% Na and 41.08% S

Step 1. Find the formula of the compound. Na2S

Step 2. Find the molar mass of the compound. 78.04 g/mol

Step 3. Determine how much of the mass comes from the atoms of each element. 45.98 g is Na and 32.06 g is S.

Step 4. Determine the equations to calculate each of the percentages.

Step 5. Calculate the percent composition of each element in the compound.

Step 6. Ensure the percentages add up to 100. 58.92% + 41.08% = 100%

c. 21.20% N, 6.10% H, 24.26% S, and 48.43% O

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