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A 0.4564 g sample of a pure soluble bromide compound is dissolved in water, and all of the bromide ion is precipitated as AgBr by the addition of an excess of silver nitrate. The mass of the resulting AgBr is found to be 0.8815 g.
What is the mass percentage of bromine in the original compound?
what quantity of heat is required to heat 168 g of copper from -12.2 to + 25.6 degrees C?
Nitrogen has only two isotopes of appreciable natural abundance: 14N, with atomic mass of 14.00307 amu; and 15N with atomic mass of 15.00011 amu.
If iron is oxidized to Fe2+ by a copper(II) sulfate solution, and 0.676 grams of iron and 13.1 mL of 0.448M copper(II) sulfate react to form as much product as possible,
To isolate the barium ion the hydrate was reacted with sodium carbonate to from a white precipitate of barium carbonate. Data from this reaction is given below:
If the average human body discharges 850 g of CO2 per day, how much NaOH is needed each day for each person in the spacecraft? Answer in units of mol.
If I initially have a gas at a pressure of 12 atm a volume of 23 liters, and a temerature of 200k, and then I raise the temperature to 14 atm and increase the temperature to 300k, what is the new volume of the gas ?
How is the half-life of a first-order reaction effected by the concentrations of the reactants?
how does the ability of permanganate (VII) ( when being reduce to Mn2+) to oxidize aqueous chloride , bromide or iodide ions change?
As a part of this exercise, you will need to prepare 100 mL of a 0.1 M phosphate buffer at pH 7.5, and you need to calculate the amounts of NaH2PO4 and K2HPO4 that you need to use in your buffer.
the practical benefits of using a more favorable direction of the reaction for a routine enzyme activity assay
Allyl sulfide, C6H10S, is a compound that has the odor of garlic. How many sulfur atoms are in 23.2 g of C6H10S?
Dissolving 3.00 g of an impure sample of CaCO3 in an excess of HCl acid produced .656 L of CO2 (measured at 20 degrees C and 792 mmHg). calculate the percent by mass of calcium carbonate in the sample. State any assumptions.
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