chem quiz #2 - hydrogen phosphate? a) 5 b) 6 c) 7 d) 8 e) 9...

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Chem 142B A10 Quiz #2 - Ch2/ Ch3 Page  1  of 1 Question 1. A compound of copper and sulfur contains 88.39 g of metal and  44.61 g of nonmetal.  How many grams of copper are in 5.364 kg  of the compound? a)  4.741 x 10 g b)    3.565 x 10 3   g c)  1.799 x 10 3  g d)  2.707 x 10 3  g e)  none of the above a) b) c) d) e) Question 2. Gallium has two naturally occurring isotopes,  69 Ga (isotopic mas  68.9256 amu, abundance 60.11%) and 71 Ga (isotopic mass  70.9247 amu, abundance 39.89%).  Calculate the atomic mass of 
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gallium. a)    69.72 amu b)  69.93 amu c)  70.13 amu d)  none of the above a) b) c) d) Question 3. How many hydrogen atoms are in a formula unit of ammonium 
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Unformatted text preview: hydrogen phosphate? a) 5 b) 6 c) 7 d) 8 e) 9 a) b) c) d) e) Question 4. What is the molecular formula of a compound if the empirical formula is CH 2 and the molecular mass is 42.08 g/mol? a) CH 2 b) C 2 H 4 c) C 3 H 6 d) C 4 H 8 e) none of the above a) b) c) d) e) Question 5. A sample of 0.370 mol of a metal oxide (M 2 O 3 ) weighs 55.4 g. How many grams of M are in the sample? a) 37.6 g b) 18.8 g c) 22.2 g d) 41.0 g e) none of the above a) b) c) d) e) Review >> Time remaining: 0:14:59 Questions or Comments? Contact Andrea Carroll at ageddes@u.washington.edu...
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chem quiz #2 - hydrogen phosphate? a) 5 b) 6 c) 7 d) 8 e) 9...

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