Decomposition of potassium chlorate
The decomposition of potassium chlorate (KClO3) is used as a source of oxygen in the laboratory. How much potassium chlorate is needed to produce 20.7 mol of oxygen?
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What is the final volume in milliliters when 0.780 of a 39.7 (m/v) solution is diluted to 25.0 (m/v)? Express your answer numerically in milliliters.
A 350.0 mL sample of oxygen gas was collected over water at a temperature of 25.0ºC and 740.0 mm Hg. How many moles of gas were there in this sample if the vapor pressure of water at 25.0ºC is 23.8 mm Hg?
In a combustion reaction 4 moles of C8H18 react with 8 moles of O2. If the actual yield of CO2 produced is 28.16 grams, what is the percent yield?
According to the ideal gas law, a 10.0 mol sample of methane gas in a 0.815 L container at 503 K should exert a pressure of 506 atm. By what percent does the pressure calculated using the van der Waals' equation differ from the ideal pressure? For
Consider a one dimensional crystal with a total of six atoms, each with mass m, seperated by a lattice constant of 0.5 nm, with the two end atoms fixed.What is the ratio of the maxium allowed wavelength to the minimum allowed wavelength?Calculate
The number of women-years of exposure is less than for established methods and all available evidence should be considered before prescribing new products.
Assume that the density of the solution is 1.00 g/cm3. Calculate the mass percent, molarity, molality, and mole fraction of NaCl.
Calculate the molarity of the following solutions:
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