1) What is the % chlorine in Cl2O7? a) 28.57% b) 63.30% c) 38.76% d) 61.24% 2) What is the % K in K2CO3? a) 58.58% b) 39.46% c) 61.24% 3) What is the % H in H2O? a) 5.94% b) 11.21% c) 5.60% d) 12.63% 4) What is the % O in KMnO4? a) 20.20% b) 40.50% c) 18.89% d) 64.72% 5) What is the % H in HCl? a) 1.45% b) 10.65% c) 2.77% d) 8.13% 6) What is the % N in Mg(NO3)2? a) 18.89% b) 10.43% c) 11.84% 7) What is the % P in (NH4)3PO4? a) 43.22% b) 25.57% c) 38.64% d) 20.77%

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