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Calcium reacts with oxygen to make calcium oxide, CaO. Explain what is the maximum mass of CaO(s) in grams that could be prepared from 21.86 g of Ca(s) as well as 11.27 g of O2(g)?
The column is run with a solvent system based on hexanes, but which becomes more polar with the addition of more and more dichloromethane over time. Predict the elution order.
an elemental has a mass of 10.3 grams. if the volume is 58.4 liters and the pressure is 758torrs at a temperature of
Explain if an unknown gas takes 2.41 times longer to effuse than methane (CH4) then Define what is the molar mass of the unknown gas
Iodine-131 decays to produce xenon-131. Which type of nuclear radiation is emitted in this reaction
An unknown compound contains only carbon, hydrogen, and oxygen (C x H y O z). Combustion of 5.50g of this compound produced 8.07g of carbon dioxide and 3.30g of water.
Sample containing three organic compounds: a hydrocarbon (RH), carboxylic acid (RCOOH), and an amine (RNH2, organic compound with acid-base properties similar tammonia).
A flask contains only H2 at 59.2 atm and I2 (g) at 118. atm. The contents are then allowed to come to equilibrium according to the equation H2 (g) + I2 (g) 2HI (g) , Kp = 50.5
A tank having a volume of 1000 ft3 contains 22 lb of CO2, 46 lb of O2 and 154 lb of N2. What pressure will be indicated by a pressure gage attached to the tank if the gas is at ambient temperature (80°F)
A .500M solution of a weak acid, HX, is only partially ionized. The [H+] was found to be 3.69x10^-3M. Find the dissociation constant for this acid.
175g of water was heated from 15 degrees to 88 degress celsuis. how many kilocalories were absorbed by the water?
a solution is prepared by dissolving 246 g of sucrose c12h22o11 in 624 g of water. what is the vapor pressure of this
which ions in water make it 'hard'? is it possible to test for only one of these ions quantitatively in the presence of the other.
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