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Chromium oxide is made by reacting Na2Cr2O7 with ammonium chloride to make chromium III oxide, sodium chloride, nitrogen and water.
if 147 Megagrams of chromium (III) oxide is formed in the reaction of 275 Megagrams of Na2Cr2O7, with excess ammonium chloride, what is the percent yield?
Electromagnetic radiation has an energy of 926 J. The wavelength of this radiation is 856 nm. How many photons are required to generate this energy?
HCOOH and HCOONa How many milliliters of HCOOH and HCOONa would you use to make approximately a liter of the buffer?
How many grams of solute are required to make a 147 mL solution of sodium hydroxide with a concentration of 0.5330 M.
When 1.00 g of urea (CO(NH2)2) is dissolved in 200g of solvent A, the freezing point is lowered by 0.250C. When 1.50 g of the nonelectrolyte Y is dissolved in 125 g of the same solvent
Assuming the pressure and temperature of the gas remain constant, calculate the number of moles of gas added to the container.
The density of a sodium sulfate solution is 1.07 g/cm3. The solution is 8.00% sodium sulfate by mass. How many cm3 of the solution are needed to supply 4.28 g of sodium sulfate?
If 1.50g (NH4)2SO4 is dissolved in enough water to form 250 ml of solution, what is the molarity of the solution.
What is the pressure (in atm) exerted by a 2.00 mole sample of gas that occupies 2.50 L at 307.15K? The value of R = 0.0821 L atm mol - 1 K - 1 .
What is the concentration of a solution of lithium carbonate containing 0.01 mol in 750 mL of solution? Give your answer to two significant figures and include the units as mol L-1 ie 0.36 mol L-1
The density of water decreases from 1.000g/mL at 3.98°C to 0.9170g/mL as ice at 0°C. By what volume (in mL) would a 2.632 liter flexible plastic bottle increase.
What volume of ethanol must be diluted with water to prepare 308 mL of 0.700 M solution?The density of ethanol is given as 0.789 g/mL.
What is the volume of Ammonia gas is dissolved in 40.0 mL of 15.0 M NH 3 solution at STP and Determine what is the vapor pressure of a solution made by dissolving 65.4grams ammonia in 259 grams of H 2 O at 55.0 ºC?
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