# HW05 - 3 O 4 + CO => CO 2 + Fe, is balanced and the...

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HW05 Q1 The molecular weight of Al 2 (SO 4 ) 3 is: a. 75 u b. 105 u c. 150 u d. 342 u Q2 A mole of butane, C 4 H 10 , is: a. 58 g b. 58 c. 13 g d. 14 g Q3 The mass of 3.01 x 10 21 molecules of sugar, C 12 H 22 O 11 , is: a. 171 g b. 17.1 g c. 1.71 g d. 342 g Q4 Nitrogen and hydrogen react to produce ammonia, NH 3 . When this reaction is represented by a balanced chemical equation having the LOWEST set of integers as coefficients, the sum of the balancing coefficients is: a. 3 b. 4 c. 6 d. 7

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Q5 If the skeleton equation, CH 3 OH + O 2 => CO 2 + H 2 O, is balanced and the coefficients are expressed as the LOWEST set of integers, the sum of the balancing coefficients is: a. 11 b. 10 c. 8 d. 7 Q6 Magnesium and nitrogen from the air react to form a compound that obeys the inert gas rule. If the skeleton equation for this reaction is balanced and the coefficients are expressed as the LOWEST set of integers, the sum of the balancing coefficients is: (Hint: use the inert gas rule to obtain the formula of the product.) a. 4 b. 3 c. 7 d. 5 Q7 If the skeleton equation, Fe
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Unformatted text preview: 3 O 4 + CO => CO 2 + Fe, is balanced and the coefficients are expressed as the LOWEST set of integers, the sum of the balancing coefficients is: a. 10 b. 12 c. 14 d. 16 Q8 If the skeleton equation, Na + H 2 O => NaOH + H 2 , is balanced and the coefficients are expressed as the LOWEST set of integers, the sum of the balancing coefficients is: a. 7 b. 8 c. 10 d. 12 Q9 Which of the following molecules formed in interstellar space contains a triple bond? a. Water b. Ammonia c. HCN d. CH 4 Q10 One of the major technologies in agriculture involves the production of fertilizer. The key reaction in the production of nitrogen fertilizers involves the reaction of nitrogen and hydrogen to produce ammonia. In 2000, the world production of ammonia was 130 million tonnes. How many tonnes of hydrogen were consumed by the production of ammonia worldwide? (A tonne is 1000 kg.) a. 130 M tonnes. b. 22.9 M tonnes. c. 6.4 M tonnes. d. 15.3 M tonnes....
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## This note was uploaded on 10/19/2011 for the course CHEM 83 taught by Professor Bonk,j during the Fall '08 term at Duke.

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HW05 - 3 O 4 + CO => CO 2 + Fe, is balanced and the...

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