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Suppose that 0.490 mol of methane, CH_4(g), is reacted with 0.640 mol of fluorine, F_2(g), forming CF_4(g) and HF(g) as sole products. Assuming that the reaction occurs at constant pressure, how much heat is released?
If the absorbance of a sample of Diet Dr. Pepper is 0.215 at 214nm, what percentage of the 214nm radiation falling on the sample passes through it?
The following four numbers are estimates of the mass of an object: 5.20 g, 5.66 g, 6.10 g, and 5.35 g. What is the standard deviation to 2 significant figures
what are the principal causes for the differences in conductances of isomolar solutions of kno3 hno3 cano32 and
What are the net ionic equations for: 1. Potassium Fluoride and Ammonium Chloride and 2. Sodium Hydrogen Sulfite and Potassium Cyanide
Aluminum metal shaving (10g) was placed in 100mL of 6.00M hydrochloric acid. What is the mass of hydrogen gas that can be produced. 2Al (s) + 6HCl (aq) -----> 2AlCl3 + 3H2 (g)
The electrolysis of molten A12O3 at 980 ºC is used to produce metallic aluminum. A current of 777 A is used in the electrolysis cell. What is the rate of formation of aluminum, in kilograms per hour
The mass of a beaker is 7.839g. After 7.50 mL of hexane, C6H14, is pipetted into the beaker, the combined mass of the beaker and the heaxane sample is 12.806g. What is the measured density of hexane?
A brewery has a horizontal conveyor belt to transfer malted barley from a storage silo to the mash tun (the large vessel where the malted barley is steeped in hot water)
What weight of malononitrile would be recovered by extraction with (a) three 100-mL portions of ether; (b) one 300-mL portion of ether.
methanol also called methyl alcohol is the simplest alcohol. itis used as a fuel in race cars and is a potential
How much dry solute would you take to prepare each of the following solutions from the dry solute and the solvent
gout is caused by an error in nucleic acid metabolism that leads to a buildup of uric acid in body fluids which is
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