For questions 1 and 2 consider the chemical equation:

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 <a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0072509791/169255/mcqCh11ieq01.jpg','popWin', 'width=91,height=84,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (8.0K)</a> 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.
11		The formula weight of C6H12O6 is
			A)	180 u.
			B)	72 u.
			C)	29 u.
			D)	24 u.
12		The number of sulfur atoms in Al2(SO4)3 is
			A)	3.
			B)	4.
			C)	7.
			D)	12.
13		The formula for a compound is given as C2H2. This is a (an)
			A)	empirical formula.
			B)	molecular formula.
			C)	structural formula.
			D)	redundant formula.
14		What number should be in front of H2SO4 in the equation below? 2A1 + ? H2SO4® A12 (SO4)3 + 3H2O
			A)	1
			B)	2
			C)	3
			D)	4
15		The equation below is balanced by placing what number in front of the carbon dioxide? 2C2H5OH + 6O2® ?CO2 + 6H2O
			A)	4
			B)	6
			C)	10
			D)	14
16		Which of the following equations is balanced?
			A)	4P + 10 O2® 2 P2O5
			B)	SO2 + O2® S2O5
			C)	2Al + 3HCl ® 2AlCl3 + 3H2
			D)	3Mg(OH)2 + 2H3PO4® Mg3(PO4)2 + 6 H2O
17		Which of the following represents a replacement reaction?
			A)	Au(5) + HCl(aq)®
			B)	Zn(5) + CuCl2(aq)®
			C)	NaOH(aq) + HNO3(aq)®
			D)	C + O2®
18		Which of the following represents a combination reaction?
			A)	Au(5) + HCl(aq)®
			B)	Zn(5) + CuCl2(aq)®
			C)	NaOH(aq) + HNO3(aq)®
			D)	C + O2®
19		Which of the following represents an ion exchange reaction?
			A)	Au(5) + HCl(aq)®
			B)	Zn(5) + CuCl2(aq)®
			C)	NaOH(aq) + HNO3(aq)®
			D)	C + O2®
20		Which of the following would not result in a reaction?
			A)	Au(5) + HCl(aq)®
			B)	Zn(5) + CuCl2(aq)®
			C)	NaOH(aq) + HNO3(aq)®
			D)	C + O2®
21		If the atomic mass of oxygen is 16 u and Avogadro's number is 6.02 × 1023 particles per mole, then one mole of ozone, O3, contains
			A)	6.02 X 1023 molecules.
			B)	12.04 X 1023 molecules.
			C)	18.06 X 1023 molecules.
			D)	9.63 X 1024 molecules.
22		How many moles of hydrogen atoms are present in 1 mole of H2O?
			A)	1
			B)	2
			C)	3
			D)	4
23		The mass of 6.02 × 1023 atoms of gold (Au) is
			A)	79 g.
			B)	197 g.
			C)	475.6 × 1023 g.
			D)	1,186 × 1023 g.
24		How many moles of oxygen atoms are present in 1 mole of H2O?
			A)	1/2
			B)	1
			C)	2
			D)	3
25		The formula weight of carbon dioxide, CO2 is
			A)	28 u.
			B)	44 u.
			C)	56 u.
			D)	72 u.