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vitamin tablet contains 125 mg of vitamin C (C6H8O6). How many vitamin C molecules are contained in the tablet?
How many grams of Na3PO4 will be needed to produce 425mL of a solution that has a concentration of Na+ ions of 1.10M ?
A mixture of CaCO3 and CaO weighing 0.630 g was heated to produce gaseous CO2. After heating, the remaining solid weighed 0.500 g.
Consider the titration of 100.0 ml of .100M H2NNH2 by .200 M HNO3. Calculate the pH when the following volumes of HNO3 have been added
One of those bands consists of radio waves with a wavelength near 20.m . Calculate the frequency of these radio waves. Be sure your answer has the correct number of significant digits.
If solubility of a gas is 7.5 g/L at 404 kPa pressure, what is the solubility of the gas when the pressure is 2021 kPa?
sulfuric acid acts as a catalyst for making esters. Write an equation showing the production of Isoamyl alcohol
Consider a molecule with spacing between two energy levels of 0.250 kJ mol-1. Calculate the wavelength and wavenumber of the photon that would be needed to lead to an excitation between these two levels.
Propane is often used for gas grills and is typically purchased by filling a propane tank with 20 pounds of propane. What is the enthalpy change when 18 pound of propane is burned?
A buffer having equal amounts of a weak acid and its conjugate base has a pH =4.4. A small amount of sodium hydroxide was combined to this buffer solution .
Calculate the concentration of OH- ion remaining in solution. Calculate the concentration of Sr+ ion remaining in solution. Calculate the concentration of NO3- ion remaining in solution.
Assume three significant figures and an average wavelength of 504 nm for solar radiation. A green leaf has a surface area of 2.00 cm^2
what is the volume change when 2 kg of water at 6.8 MPa and 93 Celsius expands to 1.6 bar
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