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the combustion of how many moles of ethane would be required to heat 923g of water from 25.0 C to 78.0 C?
A separate experiment is conducted in which 4.82 x 10-5 M CaI2(aq) is added to a solid solution of PbI2 at 20 oC. Qualify how the molar solubility changes
Calculate the dilution factor for all 7 test test tubes. Show all work/calculations. 0.1 ml of the solution from the serial dilution 10^-4, 10^-5 and 10^-6 was pipetted onto three separate agar plates.
Suppose that 28 g of gold is initially at 29.0 degrees celsius. What is the final temperature gold upon absorbing 2.25 kJ of heat?
Find the concentration and pH solution - What is the pH of a solution of 0.65 M acid and 0.51 M of its conjugate base if the pKa = 5.30?
A piece of solid carbon dioxide, with a mass of 7.8g is placed in a 4.0L otherwise empty container at 27 deg C. What is the pressure in the container after all the carbon dioxide vaporizes?
What mass of sucrose should be combined with 464g of water to make a solution with an osmotic pressure of 8.60atm at 280K? (Assume the density of the solution to be equal to the density of the solvent.)
Identify the unknown gas - Find the molecular formula of the compound
What is the molecular weigh of acetic acid that will form 2 moles of CO2 assuming complete combustion.
At a distance of 41 ft an ionizing radiation source delivers 4.5 rem of radiation. How close could you get to the source and still have no biological effects?
A sample of ethanol (C2H5OH) has a mass of 45.0 g. How many carbon atoms does the sample contain?
A Why is it an important concept that atoms generally appear in whole number molar ratios to each other in chemical compounds? What does this tell us about the nature of matter?
Determine the heat that must be extracted to cool the gas from 375 C to 275 C at (a) Constant Pressure and (b) constant volume.
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