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What is the total sample size (in grams) for a sample of magensium nitrite which contains 0.96 g of oxygen
Use bond enthalpies to estimate the enthalpy change for the following gas-phase reaction.
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.)
A reaction mixture initially contains 1.6 L of A and 1.8 L of B. Assuming that the volume and temperature remain constant, what is the percent change in pressure if the reaction goes to completion?
After purifying your product, you collect 8.69 g. Calculate the percent yield of the alum.
O2 gas is held over a container of water. If the total pressure of the gas mixture is 10.2 atm, what is the concentration of dissolved He in the water?
A solution contains Ba2+ (1.0x10^-3) and Ca2+ (1.0x10^-3). Drops of a 5.0x10^-1 M solution NaF were added using a buret until the [F-] in the solution mixture reached 1.5x10^-3 M.
Calculate the pH after 0.020 mol NaOH is added to 1.00 L of a solution which is 0.100 M NH2OH and 0.100 M HONH3Cl.
orbitals in the HCl molecule, taking ?= -1.0 eV and the ionization of energy of atomic chlorine as 13.1 eV.
A water balloon with a volume of 260.0 L has launched at 20 degrees celcius at sea level where the atmospphereic pressure is 1.00 atm.
Liquid NCl3 in a 2.5 L closed container is heated until it decomposes completely to gaseous products. The resulting mixture exerts a pressure
Calculate the mass of magnesium, in mg, needed to generate 80.0 mL of H2 gas. Assume a temperature of 22.0 °C
compare the number of valence electrons in an atom of oxygen, O , with the number of valence electrons in an atom of selenium in the same period or group.
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