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The heat of vaporization of water is 40.66 kJ/mol. Define how much heat is absorbed when 2.16 g of water boils at atmospheric pressure?
How many molecules of ethanol (C2H5OH) (the alcohol in alcoholic beverages) are present in 165 mL of ethanol? Density of ethanol is 0.789g/cm3 ?
Why is the concentration of a hygroscopic solid not able to be calculated precisely using its mass and the volume of the solution
you have a certain mass of helium gas in a rigid steel container. you add the same mass of neon gas to this container.
a mixture of gases with a pressure of 800.0 mm hg contains 60 nitrogen and 40 oxygen by volume. what is the partial
HCL is a significant component of gastric juice. what is the concentration of chloride ion in gastric juice at pH=1.27?
If you start the experiment with 0.500 grams of Nickel (II) Acetate Tetrahydrate, how many grams of nickel acetate are in the sample
A sample of gas with an initial volume of 32.0 L at a pressure of 755 mmHg and a temperature of 325 K is compressed to a volume
Explain at what wavelengths in nanometers would stokes and anti-stokes Raman lines for carbon-tetrachloride (delta v = 218, 314, 459, 762, and 790 cm^-1) emerge if the source was a helium neon laser (632.8 nm)
A sample of H2 gas has a pressure of 0.695 atm in a 269 mL flask. The sample is transferred to another container where it exerts a pressure of 0.330 atm. What is the volume (mL) of the second container at the same temperature
When 1 mol of CO (g) forms from its elements, 110.5 kJ of heat is released. Write a balanced thermochemical equation for formation of one mole of CO.
What ions and/or molecules are present in relatively large proportions in a solution of the soluble ionic compound KCl (aq)?
A sample of 0.0020 mole of HCL is dissolved in water to make a2000-mL solution. Compute the molarity of the HCL solution, the [H3O+], and the PH. For a strong acid such as HCL, the [H3O+] is the same as the molarity of the HCL solutions.
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