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Calcium oxide (CaO), also known as quicklime, can be produced by heating calcium carbonate (CaCO3). It was found that 36.89 g CaO contains 26.37 g Ca.
(a) The ratio of masses of calcium to oxygen in calcium oxide = _______________.
Explain why is it important to add the solution of bromine quickly as well as in one portion to the test tube containing the aromatic substrate
A frog with the a mass of 4.60 oz can catch 2.0 flies every 3.5secs. if the avg. fly has a mass of 2.5mg how long will it take the frog to increase its mass to .35kg
If the process occurs adiabatically and at constant (atmospheric) pressure (a) what is the mass of water that solidifies and (b) what is the change in entropy of the system?
What [OH-] is necessary to start precipitation of Cu(OH)2 in a 0.0014 M copper(II) chloride solution?
A solution contains some or all of the ions Cu^{2+}, Al^{3+}, K^+, Ca^{2+}, Ba^{2+}, Pb^{2+}, and {NH_4}^+. The following tests were performed, in order, on the solution
Solid iron reacts with liquid water to produce solid iron(III) oxide and hydrogen gas. Balance the redox reaction. What is the oxidizing agent in the redox reaction and what is the total number of electrons transferred in the reaction?
A rectangular block of plastic, measuring 1.34 cm by 2.27 cm by 1.39 cm, floats in the middle of the Pacific Ocean. The volume of sea water displaced by the plastic block is 3.35 cm3. Assuming the density of the sea water is 1.025 g/mL, what is th..
What is the pressure (in atmospheres) of a sample of gas trapped in the closed-tube mercury manometer
1. What happens to the value of the equilibrium constant for a reaction if the reaction equation is reversed? Multiplied by a constant?2. What is the effect of a change in volume on a chemical reaction (that includes gaseous reactants or products) in..
A pasta side contains 20 grams of carbohydrate. If carbohydrate has a caloric value of 4 kcal/g, How many kcal or energy are from the carbohydrate in potato?
5.00 mL of commercial bleach was diluted to 100.0 mL. 25 mL of that diluted sample was titrated with 4.56 mL of 0.10 M S2O3^2-. What is the concentration of the hypochlorite in the original bleach solution?
What happens to the absorbance at the analytical wavelength for P of the mixture as the reaction progresses?
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