
Concept explainers
Interpretation: The percent of nitrogen by mass in the given compounds with the help of below graph for NaCN, HNO3, NH3 and Ca(NO3)2 needs to be matched.
Concept Introduction: Mass percentage is the way to calculate the percentage of each element in the given molecular compounds. The mathematical expression of mass percentage can be shown as:

Answer to Problem 6RQ
A = NaCN
B = NH3
C = Ca(NO3)2
D = HNO3
Explanation of Solution
Given information:NaCN, HNO3, NH3 and Ca(NO3)2 have N element.
Molar mass of N = 14.00 g/mol
Molar mass of NaCN = 49.00 g/mol
Molar mass of HNO3 = 63.01 g/mol
Molar mass of NH3 = 17.0 g/mol
Molar mass of Ca(NO3)2 =164 g/mol
Calculate the mass percentage of N in each compound:
Thus the compound:
A = NaCN
B = NH3
C = Ca(NO3)2
D = HNO3
Chapter 6 Solutions
World of Chemistry, 3rd edition
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