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Two 20.0-g ice cubes at -21.0 °C are placed into 235 g of water at 25.0 °C. Assuming no energy is transferred to or from the surroundings, calculate the final temperature of the water after all the ice melts.
What is the silver ion concentration in a solution prepared by mixing 357 mL of 0.392 M silver nitrate with 469 mL of 0.504 M sodium phosphate?
When a 8.37-g mixture of methane, CH4, and ethane, C2H6, is burned in oxygen at constant pressure, 445.8 kJ of heat is liberated. What is the percentage by mass of CH4 in the mixture
CO(g)+2H2(g)->CH3OH(g) How many moles of each reactant are needed to produce 3.60 X 10^2g of CH3OH?
In the bromination of ethane (C2H6) reaction, one wants to produce 10.0 g of C2H5Br product. How many grams of C2H6 would be needed to react with excess Br2.
The freezing point for t-butanol is 25.50 degrees C and kf is 9.1 degrees C/m. Usually t-butanol absorbs water on exposure to the air. If the freezing point of a 10.0 g sample of t-butanol is measured as 24.59 degrees C, how many grams of water ar..
each square foot of lawn accumulates 1150 new snow flakes every minute, how much snow (in kilograms) accumulates on your lawn per hour? Assume an average snow flake has a mass of 1.80 mg.
calculate the actual yield of magnesium nitrate formed from 113.9 g of magnesium and excess copper(II) nitrate.
Estimate the pH, and the concentrations of all species in a 0.300 M phosphoric acid solution. pKa1: 2.16 pKa2: 7.21 pKa3: 12.32 Hint: Convert the pKa values to Ka values
Assuming that the specific heat capacity of the solution is the same as for water, calculate the heat transfer from system to surroundings, in kilojoules
A solution of ethanol (C2H5OH) in water is prepared by dissolving 69.8 mL of ethanol (density = 0.79 g/cm3) in enough water to make 250.0 mL of solution. What is the molarity of the ethanol in this solution?
Two of these students will report, within experimental error, the same increase in solution temperature for the neutralization. Which are the two students? Explain.
the final temperature of both the water and metal is 32.81 degrees C. The specific heat of water is 4.184j/g*K. What is the speciic heat of the metal?
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