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When molten KBr is electrolyzed, write the reaction and state the product that occurs at
the anode.
(3 marks)
A 1.2 grams of butane, C. H. (FW: 58) was burned in a bomb calorimeter causing an
increase of temperature by 5.5°C. The calorimeter constant is 11.3 kJC" Determine the
enthalpy of combustion of butane
(4 marks)
(d)
A spoon was electroplated with chromium, Cr (FW 52.0) for a period of 5.5 minutes
using a constant current of 2.2 A. Calculate the weight of chromium that will be
electroplated onto the spoon. (Given: Cr + 3e Cr E= -0.740 V)
(4 marks)
أما
Iron oxide an
Answers: 2
Chemistry, 21.06.2019 20:30
As you move from right to left on the periodic table the atomic radius fill in the blank
Answers: 2
Chemistry, 21.06.2019 23:00
City a and city b had two different temperatures on a particular day. on that day, four times the temperature of city a was 8â° c more than 3 times the temperature of city b. the temperature of city a minus twice the temperature of city b was â’3â° c. what was the temperature of city a and city b on that day? city a was 5â° c, and city b was 4â° c. city a was 3â° c, and city b was â’1â° c. city a was 8â° c, and city b was â’3â° c. city a was 5â° c, and city b was â’5â° c.
Answers: 2
Chemistry, 22.06.2019 03:30
Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.
Answers: 1
Chemistry, 22.06.2019 04:00
Two nitro no2 groups are chemically bonded to a patch of surface. they can't move to another location on the surface, but they can rotate (see sketch at right). it turns out that the amount of rotational kinetic energy each no2 group can have is required to be a multiple of ε, where =ε×1.010−24 j. in other words, each no2 group could have ε of rotational kinetic energy, or 2ε, or 3ε, and so forth — but it cannot have just any old amount of rotational kinetic energy. suppose the total rotational kinetic energy in this system is initially known to be 32ε. then, some heat is removed from the system, and the total rotational kinetic energy falls to 18ε. calculate the change in entropy. round your answer to 3 significant digits, and be sure it has the correct unit symbol.
Answers: 2
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When molten KBr is electroly...
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When molten KBr is electroly...
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