Chapter 12 Multiple Choice Quiz 1

Please answer all questions

For questions 1-2 consider the chemical equation: CH₄ + 2 O₂ --> CO₂ + 2 H₂O

1		The number of atoms on each side of the equation is
			A)	5
			B)	6
			C)	7
			D)	9
2		The total mass of products in the methane reaction above is
			A)	80 u
			B)	64 u
			C)	62 u
			D)	48 u
3		The formula weight of methane, CH4 is
			A)	13 u
			B)	16 u
			C)	52 u
			D)	none of these
4		The empirical formula of C4H8 is
			A)	CH
			B)	CH2
			C)	C4H8
			D)	C2H4
5		The reaction 2 Mg + O2 --> 2 MgO is an example of
			A)	decomposition
			B)	combination
			C)	replacement
			D)	ion exchange
6		When the equation __Li + __O2 --> __Li2O is correctly balanced, the sum of the coefficients is
			A)	3
			B)	5
			C)	7
			D)	12
7		The reaction: 2 NaI + Cl2 --> 2 NaCl + I2 is an example of
			A)	decomposition
			B)	combination
			C)	replacement
			D)	ion exchange
8		The reaction: potassium chlorate Δ--> potassium chloride and oxygen gas is an example of
			A)	decomposition
			B)	combination
			C)	replacement
			D)	ion exchange
9		The number of oxygen atoms in Al2(SO4)3 is
			A)	3
			B)	4
			C)	7
			D)	12
10		The equation 2 C2H5OH + __O2 --> 4 CO2 + 6 H2O is balanced by making the coefficient of oxygen
			A)	14
			B)	12
			C)	7
			D)	6