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A 6.16 g sample of a solid containing Ni is dissolved in 20.0 mL water. A 5.00 mL aliquot of this solution is diluted to 100.0 mL and analyzed in the lab. The solution was determined to contain 5.03 ppm Ni. Determine the molarity of Ni in the 20.0 mL solution. Determine the mass in grams of Ni in the original sample. Determine the weight percent of Ni in the sample.
.At 25°C and 1.0 atm, 0.25 g of a gas dissolves in 1.00 L of water. What mass of the gas dissolves in 1.00 L of water at 25°C and 3.0 atm?
What mass of oxygen gas is required in order to release 6670 kJ of heat to the surroundings by the following reaction
Indicate how many electrons are transferred in the formation of one formula unit of product
A certain sample of the mineral galena weighs 12.4 and has a volume of 1.64 mL. What is the density of galena?
The volume of a gas sample is 650. mL at STP. What volume will the sample occupy at 25.0°C and 950. torr pressure.
The liquid vaporizes quickly to gaseous nitrogen (which has a density of 1.15 g/mL at room temperature and atmospheric pressure) when the liquid is removed from the tank.
what will be the volume of the blimp at a height of 2300 m, where the temperature is 12°C?
How many calories are needed to raise the temperature of 525g of beryllium from 21.0 celsius to 375 celsius?
A 0.1946 g piece of magnesium metal is burned in a constant volume calorimeter that has a heat capacity of 1349 J/°C.
The reactant concentration in a first-order reaction was 6.70×10-2 after 25.0 and 3.30×10-3 after 100 . What is the rate constant for this reaction?
If 16.0 mL of .150 M HCL is needed to neutralize all the NH3 from a 2.25-g sample of organic material, calculate the mass percentage of nitrogen in the sample.
Which components of an acrylamide gel effects qualities of the final product, and which components affect the speed of polymerization?
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