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Calcium hydride (CaH_2) reacts with water to form hydrogen gas. How many grams of CaH_2 are needed to generate 55.0 L of H_2 gas at a pressure of 0.995 atm and a temperature of 32 degrees Celsius?
The Ka for HF is 3.5 × 10-4. What would you expect the percent ionization to be for the same concentration of hydrochloric acid (HCl)? Explain.
What is the final concentration (in M) of 15.4 mL iron(III) chloride solution with an initial concentration of 1.94 M which is diluted with 19.5 mL of solvent
What by-product is formed along with benzilic acid in this experiment? Draw a structural formula for this substence.
When square brackets are placed around the formula for a substance, such as [NaOH], it indicates that we are working with the percent-by-mass
Calculate the distances NH3 gas and HCL gas would travel in this experiment if a 100.00-cm tube were used, based on the accepted molar masses of the two gases.
Which of the following pairs of molecules is listed in order of decreasing net dipole moment (from more polar molecule to less polar molecule)? A. CCl4 > SCl4 B. CH2Cl2 > CCl2Br2 C. SF6 > SF4 D. CCl2Br2 > CH2Cl2 Which of the following pairs of mol..
How many moles of the nonelectrolyte, propylene glycol(C3H8O2) should be dissolved in 800.0g of water to prepare a solution whose freezing point is -3.73C? For water, Kfis 1.86C m-1 and Kb is 0.51C m-1.
An important industrial for synthesizing the ammonia used in agricultural fertilizers involves the combination of N2 and H2 N2 (g) + 3H2 (g) 2NH3 (g) (Kc =4.29 *10^8 at 52 degrees C)
Combustion of a 5.50 g sample of a compound containing only C and H produces 18.59 g of CO2 and 3.81 g of H2O. In another experiment, the molar mass of the compund was found to be 78g/mol. Determine the Empirical and molecular formulas for this co..
A nugget of pure gold of 4.90 grams absorbed heat of 270 Joules. determine the final temperature of the Au if the initial temperature = 22.0°C? specific heat of Au =0.129 J/(g·°C).
The balloon is designed to continue its ascent to an altitude of 30 km, where it bursts, releasing a package of meteorological instruments that parachute back to Earth.
the specific heat of ethylene glycol is 2.42 j/k-g. How many j of heat are needed to raise the temperature of 62.0 g of ethylene glycol from 13.1°c to 40.5°c?
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