1) How many atoms of oxygen are found in the chemical formula H2O? a) 4 b) 2 c) 1 d) 3 2) What is the total amount of atoms found in this formula Ca(NO2)2? a) 6 b) 3 c) 7 d) 4 3) How many molecules are in this formula? 6Cu2SeO4 a) 6 b) 14 c) 2 d) 4 4) How many elements are in this formula? 6Cu2SeO4 a) 30 b) 3 c) 24 d) 4 5) Which chemical formula has 2 oxygen atoms? a) H2SO4 b) HNO3 c) NaOH d) SO2 6) How many atoms of oxygen are in the formula? CuSO4 a) 12 b) 6 c) 24 d) 4 7) How many hydrogen atoms are in the formula? H3PO4 a) 4 b) 3 c) 2 d) 8 8) How many sulfur atoms are in this formula? H2SO4 a) 1 b) 2 c) 3 d) 4 9) What is the total amount of atoms in the formula?  2MgCl2 a) 14 b) 16 c) 2 d) 6 10) What is the coefficient in this formula? 2NaOH a) 1 b) 2 c) 3 d) 4 11) How many elements are in this formula? 2NaOH a) 1 b) 2 c) 3 d) 4 12) Which is a reactant from this equation? 2H + O --> H2O a) OH b) H2O c) O d) NaOH 13) What does the Law of Conservation of Mass state? a) Matter is not created or destroyed, only changed. b) Matter can be created. c) Matter can be destroyed. d) Matter does not exist. 14) What is the product of the equation? Na2 + Cl2 ----> 2NaCl a) Na2 b) Cl2 c) C d) 2NaCl 15) How many hydrogen atoms are in (NH4)2SO4? a) 10 b) 1 c) 4 d) 8

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