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Quicklime, CaO, can be produced by heating calcium hydroxide, Ca(OH)2. What is the percent yield if 45 grams of quicklime are obtained from 1 mole of calcium hydroxide?
the density of the compound as a gas was found to be 4.02g/L at 127 degrees C and 256 torr. What are the empirical and molecular formulas of the compound
A quanity of oxygen gas was collected over water at 30 c in a 475 mL container. The pressure in the container was measured to be 105 kPa. How many grams of oxygen gas were collected?
How much heat is required to raise the temperature of a stainless steel pot weighing 450 g and containing 270 g of water from 25 degrees Celsius to boiling if the specific heat capacity of stainless steel is 0.51 J/(g*degrees C)
Calculate the molarity of a solution made by adding 21.7 mL of concentrated potassium hydroxide (34.5 % by mass, density 1.46 g/mL) to some water in a volumetric flask
A 54.14 g sample of a substance is initially at 28.6 C. After absorbing 2631 J of heat, the temperataure of the substance is 179.1 C. What is the specific heat (c) of the substance
Which of the following has no effect on the equilibrium position of a reversible reaction in the gaseous state?
While 5.0 g of an unknown substance is dissolved in 100.0 g of water, the freezing point of the solution reduces by 1.5 degrees Celsius. Explain what is the molar mass of the unknown substance if the compound doesn't dissociate to form ions in sol..
Determine how will this error control the final computed percentage of CH3COOH in the vinegar
5.0 g of H2O at 23.0 oC is added to 100.0 g of H2O at 67.5 oC. What is the temperature of the resulting mixture
A weak acid with the general formula of HA will react with a base, such as NaOH. Write the neutralization equation which describes the reaction.
The reaction of 0.25 g magnesium with 100 mL of 1 M hydrochloric acid (density d = 1.02 g/ml) raises the temperature of the solution from 20 °C to 35 °C . The specific heat for HCl is 3.93 J/(g.C).
If the mass of an object is 15 grams then determine the relative precision and accuracy for the following sets of measurements
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