Chemistry, 09.12.2020 05:00 jennycrapson
10. A 3.192 gram sample of magnesium sulfate was heated in a beaker. 10 minutes after heating was completed, the mass of the sample was 1.559g. No chemical reaction occurred. What is the molecular formula for the sample of magnesium sulfate that was heated? Show all work.
(5 pts)
11. The empirical formula of a compound is C3H2O. If the molar mass of the compound is found to be 216 g/mol, find the molecular formula (true formula). You must show all work with the units.
(3 pts)
12. Determine the empirical formula of the following compound if a sample contains 55.80 % carbon, 7.038 % hydrogen, and 37.17 % oxygen by mass. You must show all work with the units.
Answers: 2
Chemistry, 22.06.2019 10:50
How many liters of oxygen gas, at standard temperature and pressure, will react with 35.8 grams of iron metal? 4 fe (s) + 3 o₂ (g) → 2 fe₂o₃ (s)
Answers: 2
Chemistry, 22.06.2019 12:30
The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms
Answers: 1
Chemistry, 23.06.2019 16:20
What is the concentration, in grams per liter, of a solution prepared by dissolving 0.00040 mol hcl in 2.2 l h2o? assume that the volume of the solution does not change when the hcl is added.
Answers: 1
10. A 3.192 gram sample of magnesium sulfate was heated in a beaker. 10 minutes after heating was co...
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