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When 0.170 g of the hydrate CaCl2•xH2O is heated, 0.128 grams of anhydrous CaCl2 remains. What is the value of x in the formula for the hydrate? (hint: remember that x represents the ratio of moles of H2O to moles of hydrate compound, and that moles of hydrate compound equals the moles of anhydrous compound)
What is the molarity of a 15.5 m (m stands for molality) solution of HCl if the density of the solution is 1.33 g/cm^3.
To this was added 20.0 ml of DI water making to the total volume 30.0 ml. The concetration of the unknown acid was 0.868 M. What was the concentration of the original acid?
Using calorimetry experiment, how many grams of CaCl are required to cause a burn at 60 degrees celsius in 1000mL of water?
What is the HCl concentration if 69.7 mL of 0.350 M NaOH is required to titrate a 30.0 mL sample of the acid?
If 5.00 ml of a solution containing .0400 M iron is placed in a 100.0 ml volumetric flask and filled to the mark with deionized water, what will be the concentration of iron in this new solution?
How long would it take for 1.50mol of water at 100.0 °C to be converted completely into steam if heat were added at a constant rate of 21.0 J/s?
How many grams of oxygen gas (O2) will it take to oxidize 1 pound of iron metal? Make sure to show the redox reaction and all work.
What is the heat capacity of an empty glass mug weighing 300.0 g, and what quantity of heat is required to heat it from 25 oC to 75 oC?
Serum taken from a patient being treated with lithium for manic-depressive illness was analyzed for lithium concentration. A reading of 251 units was obtained for the intensity of the 671 nm red emission line.
Mesitylene is a compound consisting only of C and H. If you burn 0.115 g of the compound, and find that it produces 0.379 g of CO2 and 0.1035 g of H2O.
If 25.0 mL of NO2 gas is completely converted to N2O4 gas under the same conditions, what volume will the N2O4 occupy?
Calculate the molarity of a solution made by dissolving 12.1 grams of Na2CrO4 in enough water to form exactly 520 mL
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