A 10.00 gram sample of a mixture of potassium bromide (KBr) and sand was obtained.
Chemistry, 28.02.2020 12:46, jannaleigh
PROBLEMS
A 10.00 gram sample of a mixture of potassium bromide (KBr) and sand was obtained.
Water was added to the mixture to dissolve the KBr as KBr is soluble in water. When the
sand was filtered and dried, it was found to weigh 3.595 g. Assume that no sand was lost
during the experimental process and that the sand was completely dried. Determine the
percentages of sand and KBr in the original sample. Show your calculations clearly.
% sand:
Calculation:
Answers: 2
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For the reaction, 4 a(g) + 3 b(g) => 2 c(g), the following data were obtained at constant temperature. experiment initial[a],mol/l initial [b],mol/l initial rate, m/min 1 0.200 0.150 5.00 2 0.400 0.150 10.0 3 0.200 0.300 10.0 4 0.400 0.300 20.0 which of the following is the correct rate law for the reaction? 1. rate = k[a]2[b]2 2. rate = k[a][b] 3. rate = k[a]2[b] 4. rate = k[a][b]2
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Answers: 1
PROBLEMS
A 10.00 gram sample of a mixture of potassium bromide (KBr) and sand was obtained.
A 10.00 gram sample of a mixture of potassium bromide (KBr) and sand was obtained.
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