How many moles are present in $34 g$ of $N H_{3}$ ? (molar mass $= 17 g/mol$ )

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What is the molar mass (in g/mol) of $NaOH$ ? (H = 1, C = 12, N = 14, O = 16, Na = 23, S = 32, Ca = 40)
What is the molar mass (in g/mol) of $CaC O_{3}$ ? (H = 1, C = 12, N = 14, O = 16, Na = 23, S = 32, Ca = 40)
What is the molar mass (in g/mol) of $HN O_{3}$ ? (H = 1, C = 12, N = 14, O = 16, Na = 23, S = 32, Ca = 40)
What is the molar mass (in g/mol) of $N H_{3}$ ? (H = 1, C = 12, N = 14, O = 16, Na = 23, S = 32, Ca = 40)
What is the molar mass (in g/mol) of $C O_{2}$ ? (H = 1, C = 12, N = 14, O = 16, Na = 23, S = 32, Ca = 40)
What is the molar mass (in g/mol) of $C_{6} H_{12} O_{6}$ ? (H = 1, C = 12, N = 14, O = 16, Na = 23, S = 32, Ca = 40)