CH1020 Exercises (Worksheet 2) Book Sections: New Material: 7.1 & 7.2 1) In the reaction A +B →C +D, 3.00 grams of substance C and 3.00 grams of substance D are produced as 2.00 grams of substance A are consumed. How many grams of substance B are also consumed? 2) Combustion of sulfur may, depending on reaction conditions, produce SO2or SO3. If xgrams of O2combine with ygrams of sulfur to form SO2, how many grams of O2combine with ygrams of sulfur to form SO3? 3) Write a balanced chemical equation for each of the following reactions: a) Carbon dioxide reacts with carbon to form carbon monoxide. CO 2 ( g ) + C( s ) → 2 CO( g ) b) Potassium reacts with water to give potassium hydroxide and the element hydrogen 2 K( s ) + 2 H 2 O( ℓ ) → 2 KOH( aq ) + H 2 ( g ) c) Phosphorus (P 4 ) burns in air to give diphosphorus pentoxide. P 4 ( s ) + 5 O 2 ( g ) → 2 P 2 O 5 ( s ) 4) Some scientists believe that life on Earth originated near geothermal vents. Balance the following reactions, which are among those taking place near
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- Summer '08