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A sample of pure calcium fluoride with a mass of 15.0 g contains 7.70 g of calcium. How much calcium is contained in 45.0 g of calcium fluoride?
Germanium forms a substitutional solid solution with silicon. Compute the weight percent of germanium that must be added to silicon to yield an alloy that contains 4.43 × 1021 Ge atoms per cubic centimeter
How grams of potassium permanganate are need to decolorize one gram of 2-pentene in basic solution.
an aqueous solution that contains 285ppm of potassium nitrate kno3 is being used to feed plants in a garden. what
Determine the values for the equilibrium constants for the following reactions. (Hint: When reaction equations are added, the equilibrium expressions are multiplied.) (a) Na2O(s) + 1/2 O2(g) Na2O2(s) (b) NaO(g) + Na2O(s) Na2O2(s) + Na(l) (c) 2 NaO..
Calculate the work for a process which one mole of NH3 gas is expanded from 1.0L to 20.0L in an isothermal reversible process at 300K.
if a bottle of nail polish remover contains 158 of acetone how much heat would be released by its complete
What is the concentration of chromium ion present in a 0.01976 M solution of potassium hydroxide in contact with a large excess
If one collects the first liter of gas that moves from the original room into the evacuated room, approximately what would you expect its composition to be? Would it be the same as regular air?
When doing the kinetic trial, Peyton mistakenly omitted the starch solution from the kinetic trials. How will this omission change the appearance of the resultant solution (from mixing solutions A&B) from that of a correctly completed expiernment?..
the specific gravity of mercury is 13.64 . what would be the mass of a sample of mercury that occupies a volume of 4.55
compute the ph for each of the given cases in the titration of 50.0 ml of 0.210 m hypochlorous acidhcloaq with 0.210 m
Mass of mineral sample = 0.123 g The Na2SO4 in the sample is converted to insoluble BaSO4. The mass of BaSO4 is 0.177 g What is the mass percent of Na2SO4 in the mineral?
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