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How many moles of solute are present in each of the following solutions? (a) 145mL of 0.25M NaHCO3 (b) 631.0mL of 2.25M H2SO4
A 4.10 g nugget of pure gold absorbed 274 J of heat. What was the final temperature of the gold if the initial temperature was 27.0°C? The specific heat of gold is 0.129 J/(g·°C).
Kr (g) in a 18.5 L cylinder exerts a pressure of 11.2 atm at 28.2 °C. How many grams of gas are present
The dialyzing bag is then immersed in distilled water. Which of the following actions should be taken to remove the most salt from the mixture? Leave the bag in the distilled water for an extended period of time, Replace the dialyzing bag periodic..
Which reaction below could not be used to create C-C bonds?
The procedure calls for cautions addition of water to the reaction mixture while it is still hot. What purpose does the addition of water serve and why should the addition be done while the reaction mixture is hot? Provide an equation for the reac..
The freezing point of blood is -0.52C. (a) What is the osmotic pressure of the blood at 25C? (b) What is the vapor pressure lowering of the blood at this temperature?
Calculate the wavelength of the light emitted when the electron in a hydrogen atom falls from the n=4 shell to the n=3 shell. [1eV=1.6023*10^-19 J] report answer in meter and in nanometers
If a solution is made by adding 83 grams of sodium hyroxide to 750 ml of water what is the percent by mass of sodium hydroxide in this solutions ?
H2 and Cl2 combine to form HCl. In a gas phase equilibrium mixture of H2, Cl2, and HCl at 300 K, [HCl] = 0.0036 mol/L and [Cl2] = 0.00485 mol/L.
The pH at one half the equivalence point in an acid-base titration was found to be 5.73. What is the value of Ka for this unknown acid?
Atomic orbitals merge into molecular orbitals as the atoms move towards each other. What happens with molecular orbitals when the molecule
one mole c12h22o11 is added to 0.150 kg of water and the water is heated to 100C. what is the vapor pressure of the solution at this temperature?
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