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Zinc metal reacts with hydrochloric acid according to the following equation: Zn + 2HCl --> ZnCl2 + H2. How many grams of hydrogen gas can be obtained if 50.0 g of zinc react completely?
Formic acid (Ka= 1.7 x 10^-4) and sodium formate were used to prepare a buffer solution of pH 4.31. The concentration of the undissociated formic acid in this buffer solution was 0.80 mol/L
Molten carbonate fuel cells fueled with H2 convert as much as 60% of the free energy relased by the formation of water from H2 and O2 into eletrical energy.
How much heat is liberated by the combustion of 183 g of hydrogen? ΔHcomb = -286 kJ/mol.
Given the tabulated data, what is the lattice energy of crystalline calcium chloride?
Calculate the thickness of a salt layer left after evaporating an ocean of 35%u2030 salinity and 4-km depth.
calculate the molar mass of an unknown gas if 0.192 grams of the gas occupies a volume of 293 ml at 754.7 mm Hg and 22.5 degrees celsius.
Divers experience a problem known as the bends when they come up to the surface too fast. Write an essay linking this phenomenon with solubility.
Calculate the mass of material required if 1500 calories of energy causes a change from -27 degrees fahrenheit to 91 degrees celcius and the specific heat capacity is 0.25 joules/gram-degree C.
Consider the following qualitative analysis scenario and then classify what type(s) of qualitative analysis principle is/are being used. More than one choice may be correct.
Determine the root-mean-square speed of CO2 molecules that have an average kinetic energy of 4.21*10^(-21) J per molecule.
500.0 g of ammonia react with 51.0 moles of sulfuric acid to produce ammonium sulfate. How many moles of excess sulfuric acid are left over after the reaction is complete?
What symbol is used in a chemical equation to represent the following phrases? Select the symbol in blue and drag it into the appropriate bin
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