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Calculate the molarity (M) of a solution prepared by dissolving 13.7 g of HCl in enough water to make 2.25 L of solution.
A 2kg sample of lead is heated from a temperature of 30 degrees celsius to a temperature of 60 degrees celcius. The specific heat of lead is 128 J/kg degrees celsius. How much heat energy di this sample absorb?
Calculate the molality of C2H5OH in a water solution that is prepared by mixing 50.0 mL of C2H5OH with 108.4 mL of H2O at 20°C. The density of the C2H5OH is 0.789 g/mL at 20°C. (Assume the density of water at this temperature is 1.00 g/mL.)
What is the concentration of the solution as a mass percentage?
One of the steps in purifying silicon involves reacting the intermediate silicon tetrachloride with steam to produce high-purity silicon dioxide and hydrogen chloride gas
if water is added to magnesium nitride, ammonia gas is produced when the mixture is heated. if 10.3 g of magnesium nitride is treated with water, what volume of ammonia gas would be collected at 20 celcius and .989 atm
a 436 mL volume of hydrogen gas is collected at 25 kelvin and 725 torr. what volume will gas occupy at STP
calculate the work required to expand the cell surface. Assume the cell is surrounded by water and that T=310K.
An experiment shows that a 115 mL gas sample has a mass of 0.169 g at a pressure of 699 mmHg and a temperature of 31C.What is the molar mass of the gas?
What is the vapor pressure (in torr) above a solution prepared by mixing 47.89 g of water, H2O, with 47.65 g of ethanol, C2H5OH, at 63.50 °C?
Two of the Group 12 elements exhibit very similar chemistries to one another, while the chemistry of the third is somewhat different. Identify the Group 12 element whose chemistry is different from the other two Group 12 elements.
A 10mL aliquot of this solution, diluted to 25mL, yielded a signal of .235 units. A second 10 mL aliquot was spiked with 10mL of 1ppm standard solution of the analyze and diluted to 25mL. The signal for the spiked sample was .502 units. What is th..
How many moles of luminol are present in 2.00 L of the diluted spray?
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