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By Solving this problem student is able to understand how to calculate theoretical and percent yields in an experiment
When aluminiumburns in bromine,aluminium bromide is produced .In a certain experiment,6.0g of aluminium was reacted with an excess of bromine to yield 50.3g aluminium bromide. calculate theoretical and percent yields for this experiment.
When 1.150 grams of an unknown nonelectrolyte dissolves in 10.0 grams of water, the solution freezes at -2.16°C. What is the molecular weight of the unknown compound? Kf for water = 1.86°C/m.
2Al(s) + 2KOH(aq) + 4H2SO4(aq) + 22H2O(l) = 2AlK(SO4)2.12H2O(s) + 3H2(g) How many moles of H gas will evolved when 6 moles of Al react with excess KOH, H2SO4 and water?
The solubility of barium sulfate varies with the composition of the solvent in which it was dissolved. In which solvent mixture would BaSO4 have the lowest solubility
Acetylene, C2H2, is a gas commonly used in welding. It is formed in the reaction of calcium carbide, CaC2, with water. Given the thermochemical equations, calculate the value of ?H°f for acetylene in units of kilojoules per mole.
If the catalyst pore size is small in comparison with the mean free path, collisions with the pore wall controls the process'. The diffusivity under this condition is called 'Knudsen diffusivity'
The vapor pressure of ethanol is 100 mmHg at 34.9oC. Its molar heat of vaporization is 39.3 kJ/mol. What is the vapor pressure of ethanol in mmHg at 57.5 oC?
What is the name of the compound when you say Sodium Bromide plus Sodium Sulfide. Also, please write the formulas for each.
Calculate the hydronium-ion concentration and the pH of a 0.0059 M solution of chloroacetic acid. Ka is 1.3 10-3.
Which of the following statements correctly define SI base units and derived units in science? SELECT ALL THAT APPLY. 1. Derived units are nonmetric units. 2. The base units are the same as the decimal prefixes. 3. All that base units are metric u..
A fossil that formed with 10,000 atoms of a radioactive parent element now contains only 1,250 atoms of that element. If the half-life of the element was 1,000,000 y, how old is the fossil
Calculate the mass of ice at -15°C that must be added to cool the water to 10°C after thermal equilibrium is achieved. To find the mass of water use the density of water = 1.0 g/mL.
Suppose you wanted to heat a mug of 250. mL water from room temperature, 25°C, to 100°C to make a cup of tea. How much energy (in joules and in calories) would you need from your microwave.
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