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If you add 62.5 mL of a 3.00 M HBR solution to 187.5 mL of water to make a new solution, the concentration of the new HBr solution is what?
Calculate the cell potential for the following reaction as written at 69 °C, given that [Mg2 ] = 0.876 M and [Fe2 ] = 0.0160 M. Standard reduction potentials can be found here.
When aqueous solutions of lead nitrate and sodium iodide are mixed, a yellow precipitate of lead iodide is formed. Write the molecular, complete ionic
Thin-layer chromatograph------Describe how the Rf for a compound will change as the developing solvent is made more polar. What is meant by "developing" a TLC plate. What is meant by "visualization" of a TLC plate
A magnesium goes from its grond state to its first electronically excited state. I assume the ground state is a singlet.
you have 100 mL graduated cylinder containing 50 mL of water. you drop a 154 g piece of brass (d= 8.56 g/cm3) into the water. how high does the water rise in the graduated cylinder?
How many milliliters of 0.160 M Na2S are needed to react with 35.00 mL of 0.315 M AgNO3 Na2S(aq) + 2 AgNO3(aq) ? 2 NaNO3(aq) + Ag2S(s)
A mixture of CO(g) and O2 (g) in a 1.0-L container at 1.0x10^3 Kelvin has a total pressure of 2.2 atm. After some time the total pressure falls to 1.9 atm as the result of formation of CO2. Find the mass (in grams) of CO2 that forms.
When the external pressure on a balloon is decreased at constant temperature, what happens to the gas inside. A) The collisions become more elastic. B) the gas undergoes no changes.
The tmeperature s increased to 1200 K, so that all CaC204 decomposes to form CaO according to the reactions, The density of the gas mixture at 1200K was 0.70501 g/L. What was the mass of the calcium oxalate initially placed in the vessl?
What problem might be encountered if 1- bromo-2,2-dimethylpropane, BrCH2C(CH3)3, were used as the halide in the synthesis of a barbiturate?
Calculate the enthalpy per mole of sodium hydroxide for the dissolution process. Assume the specific heat of the solution is the same as that for pure water.
What volume of oxygen gas at 25 degrees Celcius and 1.00 atm is produced from the decomposition of 22.33 mL of a 30.0% (by mass) solution of hydrogen peroxide?
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