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A 67.9 g mixture of the compounds sodium sulfide and potassium bromide is 40.9 % by mass sodium sulfide. The compound sodium sulfide is 41.1 % by mass sulfur. Calculate the mass (g) of sodium in the mixture.
A 20.00-mL sample of 0.150 M KOH is titrated with 0.125 M HCIO4 solution. Calculate the pH after the following volumes of acid have been added.
how much heat in is evolved in converting 1.00 of steam at 155.0 to ice at -55.0? the heat capacity of steam is 2.01
A coffee cup calorimeter contains 10.0 grams of water at 59.00 degrees C. If 3.00 grams Au at 15.20 degrees C is placed in the calorimeter, what is the final temperature of the water in the calorimeter. The specific heat of water is 4.18 J/g C; th..
Ag electrode in 1.0 M Ag + (aq) and Cu electrode in 1.0 M Cu 2+ (aq). What is the cell potential when the solutions are altered, so [Ag+] = 1.25 M and [Cu 2+] =0.25 M
In either of the simple distillation experiments, can you account for the boiling point of your product in terms of the known boiling points of the pure components of your mixture?
If you want to dope GaAs to make an n-type semiconductor with an element to replace Ga, which of the elements below would you pick
Explain Molecular and Empirical Formulas, Ibuprofen, a headache remedy, contains 75.69% C, 8.80% H and 15.51% O by mass, and has a molar mass of 206g/mol.
how many milliliters of a stock solution of 2.00m kno3 would you need to prepare 100.0 ml of 0.150m
An experiment was performed to determine the solubility and the solubility product constant of lead(II) chloride (gmm = 278.10).The equilibrium involved is
A gas bottle contains .650 mol of gas at .961 atm pressure. If the final pressure is 1.15 atm, how many moles of gas were added to the bottle.
how many liters of ethane measured at 15.0 degrees celsius and 719 torr must be burned to liberate 2.89 x 104 kj of
A solution contains an unknown mass of dissolved silver ions. when potassium chloride is add to the solution.,a white precipitate forms.
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