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2B5H9+ 12O2-----> 5B2O3+ 9H20
How many moles of B2O3 can theoretically be obtained from 4 moles of B5H9 and excess O2?
How much B5H9 must be reacted with O2 to produce exactly 100 g of B2O3?
120 g of B5H9 and 200g of 02 are reacted. How much B2O3 will be produced?
150g of B2O3 were obtained. WHat is the percent yield in this reaction?
crystallize in a cubic closest packed structure. Use the density of silver (10.5 g/cm3) and its molar mass (107.9 g/mol) to calculate an approximate atomic radius for silver
Write the equation for this reaction, labeling the acid, base, conjugate acid, and conjugate base
a balloon is filled with a gas. the baloons volume is 2.1 l and the gas pressure is 1.7 atm. then the balloon is placed
What is the total pressure in a 20.0 L flask 20.0°C, which contains 0.127 moles of H2 and 0.288 moles of N2?
Describe the apparent relationship between H30+ and OH- concentrations when an endpoint is reached in an acid-base titration.
How many grams of propane must be burned to heat 180g of water from -15 degrees Celcius
calculate the specific heat of a metallic element if 478 j of energy are needed to raise the temp. of a 82.73 g sample
if 10.0 grams of sodium bicarbonate reacts with 50.0 ml of 2 m acetic acid what is the limiting reactant? what reactant
Study The chemical reaction Fe + I2 = FeI2 Then, write balanced half-reactions describing the oxidation and reduction that happen in this reaction
determine the amount of heat in kj given off when 1.89 104 g of ammonia are produced according to the following
What is the concentraion of toulene in this sample? Does this exceed the standard? (maximum contaminant level is 1.0 mg/L 6) How much calcium nitrate has to be added to 1000L of solution to provide 130ppm Ca^2+ if the water supply contains 40ppm Ca..
a has a partition coefficient of 3 between toluene and water with three times as much in the toluene phase. suppose
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