Chemistry, 07.10.2020 14:01 goalltheway4768
Uranium–232 has a half-life of 68.9 years. A sample from 206.7 years ago contains 1.40 g of uranium–232. How much uranium was originally present?
Answers: 3
Chemistry, 22.06.2019 07:40
21. consider the following chemical reaction: n2+ o2 2 no if 10.0 g of n2 reacts with excess oxygen then how many grams of no can be formed? a) 10.7 g b) 21.4 g c) 32.9 g d) 42.8 g page 4 of 8
Answers: 2
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?
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Chemistry, 23.06.2019 10:00
State the effect on the concentration of the clo- ion when there is a decrease in the concentration of the oh- ion
Answers: 1
Chemistry, 23.06.2019 17:30
What amount in moles does 242 l of carbon dioxide occupy at 1.32 atm and 20 degrees c?
Answers: 2
Uranium–232 has a half-life of 68.9 years. A sample from 206.7 years ago contains 1.40 g of uranium–...
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