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A piece of nickel foil, 0.550 mm thick, 1.25 cm width and 1.00 cm long, is allowed to react with fluorine, F2 to give a nickel fluoride. Density of nickel is 8.908 g/cm3. How many moles of nickel foil were used? If you isolated 1.261 g of nickel fluoride, what is its formula?
find the percentage composition of a compound that contains 1.94 g of carbon 0.48 g of hydrogen and 2.58 g of sulfur in
Suppose a sample containing 1.200g of Compound X is heated in 25.0 mL of heptane. What is the minimum temperature required to dissolve the sample. If the sample were then cooled to 0 degrees, what would the percent recovery of the solid that would..
The valve between these Tanks X and Y is opened and the gases are permissible to mix. After the gases have had time to mix, calculate the partial pressure of the oxygen gas?
A balloon is inflated to a volume of 8.3 L on a day when the atmospheric pressure is 652 mm Hg. The next day, as a storm front arrives, the atmospheric pressure drops to 620 mm Hg
Write down the expression for the radial distribution function of a 3p electron in a hydrogenic atom and determine the radius ar which the electron is most likely to be found
write the equations involved in the following
a 75.0 ml sample of .0500M HCN is titrated with .500 M NaOH. what is the concentration of H+ in the solution after 3.0 ml of .500 M NaOH has been added
The concentration which remains after 20 minutes is 80 mg/L. Determine the reaction order and the rate constant (with appropriate units).
A solution containing 80 g of KCl in 200 g of water at 50 0 C is cooled to 20 0C, a) How many grams of KCl remained in solution at 20 0C and b) How many grams of KCl crystallized out
what amount of heat is produced? The specific heat of aluminum is 0.90J/g C?
The mass of Earth is 5.974 ô°€ 1024 kg. Assume that Earth is a sphere of diameter 1.28 ô°€ 104 km and calculate the average density of Earth in g/cm3.
a helium-filled weather balloon is launched from the ground where the pressure is 752 mmHg and the temperature is 21 degrees celsius. under these conditions its volume is 75.0 L.
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