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Calcium hydride, CaH2, reacts with water to form hydrogen gas: CaH2 (s) + 2H2O (l) ----> Ca(OH)2 (aq) + 2H2 (g). This reaction is sometimes used to inflate life rafts, weather balloons, and the like, where a simple, compact means of generating H2 is desired. How many grams of CaH2 are needed to generate 143L of H2 gas if the pressure of H2 is 823torr at 21deg C?
What substances are present after the reaction is over? (Hint: Write a balanced chemical equation for the reaction first.) How many grams of water are formed?
A water sample is measured to have alkalinity of 130 mg/L as CaCO3 at pH=9.2, what are the concentrations of the three carbonate species
At high temperatures phosgene (COCl2) decomposes to give carbon monoxide CO and Cl2. In a typical experiment, 0.631 g of COCl2 is injected into a flask of volume 472 cc. When equilibrium is established, it is found that the total pressure is 2.175..
What is the role of HClO. ClO-(aq) + H2O(l) HClO(aq) + OH-(aq) FAST. I-(aq) + HClO(aq) => HIO(aq) + Cl-(aq) SLOW
What would the potential of a standard hydrogen (S.H.E.) electrode be if it was under the following conditions?
Correct the second part of each of the following statements. (Type your answer using the format copper(II) chloride for CuCl2, and CO2 for CO2.) (a) SF6 is sulfur heptafluoride. (b) Phosphorous pentachloride is Cl5P. (c) Carbon tetrachloride is CC..
The reaction between NO2 and CO to produce NO and CO2 is believed to occur via two steps shown below. Step 1: NO2 + NO2 ? NO + NO3
calculate the final molarity of the solution that results when 125 ml of .200 M HCL is diluted to 1.00L
Determine the mole fraction of each component to at least three significant figures.
for the reaction X(g) + 3Y(g) equilibrium 3Z(g). Kp=2.08x10^-2 at a temperature of 277 degrees Celsius. Calculate the value of Kc
Where on the modern periodic table would you probably find an element that is a dense gas at room temperature? EXPLAIN 3) What should be the most metallic element?
measured in a 1.00-cm pathlength cuvette, has an absorbance of 0.321 while the reagent blank in the same cuvette has an absorbance of 0.014. What would be the absorbance reading of these two solutions if measured in a cuvette with 5.00 cm pathleng..
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