Chemistry, 15.10.2019 20:00 naenae2cold12021
Marie stirs 4 grams of salt and 10 grams of sand together in a paper cup. she then stirs 5 grams of salt and 4 gram
of sand in another cup. she asks earl what he observes in the cups. he reports seeing grains of salt and grains of
sand. what is the best description of what marie made in the cups?
o two heterogeneous mixtures
o two different substances
o two different compounds
o two homogeneous mixtures
Answers: 2
Chemistry, 22.06.2019 20:00
State one important difference between a physical change and a chemical change?
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Chemistry, 22.06.2019 21:50
Liquid from a brewery fermentation contains 10% ethanol and 90% water. part of the fermentation product (50,000 kg/h) is pumped to a distillation column on the factory site. under current operating conditions, a distillate of 45% ethanol and 55% water is produced from the top of the column at a rate of one-tenth that of the feed. what is the composition of the waste "bottoms" from the still?
Answers: 2
Chemistry, 23.06.2019 00:10
Find the missing probability in the table below a.0.10 b.40 c.0.80 d. 0.20
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Chemistry, 23.06.2019 01:30
At a certain temperature the rate of this reaction is first order in hi with a rate constant of : 0.0632s2hig=h2g+i2g suppose a vessel contains hi at a concentration of 1.28m . calculate how long it takes for the concentration of hi to decrease to 17.0% of its initial value. you may assume no other reaction is important. round your answer to 2 significant digits.
Answers: 1
Marie stirs 4 grams of salt and 10 grams of sand together in a paper cup. she then stirs 5 grams of...
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