Chemistry, 22.08.2020 07:01 purplepig12
Oxygen gas of 27.4 L at 25β with the pressure of 1.30 atm and 8.50 L of helium gas at 25β with a pressure 2.00 atm was pumped into a tank with a volume of 5.81 L at 25β. Calculate the partial pressure of oxygen in the 5.81L tank. *
1.30 atm
4 atm
6.13 atm
3.30 atm
Answers: 2
Chemistry, 22.06.2019 03:40
Astudent is given a sample of a blue copper sulfate hydrate. he weighs the sample in a dry covered porcelain crucible and got a mass of 23.875 g for the crucible, lid, and sample. the mass of the empty crucible and lid was found earlier to be 22.652 g. he then heats the crucible to expel the water of hydration, keeping the crucible at red heat for 10 minutes with the lid slightly ajar. on colling, he finds the mass of crucible, lid, and contents to be 23.403 g. the sample was changed in the process to very light clue anhydrous cuso4. if there are again 100.0 g of hydrate, how many grams of cuso4 are in it? how many moles of cuso4? (hint: molar mass of cuso4 = 159.6 g / mole. what per cent of the hydrate is cuso4? you may convert the mass of cuso4 to moles.)
Answers: 3
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Chemistry, 23.06.2019 02:30
Apound is approximately 0.45 kilogram. a persons weighs 87 kilograms. what is the personsβs weight, in pounds, when expressed to the correct number of significant figures
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Oxygen gas of 27.4 L at 25β with the pressure of 1.30 atm and 8.50 L of helium gas at 25β with a pre...
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