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A compound was analyzed and found to be composed of 75% cardbon and 25% hydrogen. What is the Empirical formula of this compund?
A solution of water and a nonvolatile, nonionizing compound is placed in a tube with a semipermeable membrane on one side. the tube is placed in a beaker of pure water. What initial net effect will occur?
Calculate the pH of a solution made by dissolving 2.89 g of sodium fluoride and 17.1 mL of 0.309 M hydrofluoric acid in enough water to make 177 mL of solution.
Write an equation that represents the reaction of 2% aqueous KMnO4 solution with 3-hexene, CH3-CH2-CH=CH-CH2-CH3
What is the overall balanced reaction in the direction that it is spontaneous and calculate the standard cell potential.
In a separate experiment, it was found that, for fixed temperature and pressure, a 0.100 L sample of this compound takes 1.73 times longer to effuse than does a 0.100 L sample of Ar(g). What is the molecular formula of the compound? Draw possible ..
How many metric tons (t) of oxygen are combined in a sample of pitchblende that contains 2.5 t of uranium? Analysis shows that 84.2 g of pitchblende contains
Draw a Lewis structure for BrF with an arrow representing that dipole moment. Estimate the percent ionic character of the BrF bond. Which way does the dipole moment point
1.00 x 10-2 M Mg(NO3)2 and 250 ml of 1.00 x 10-1 M NaF.Calculate the concentrations of Mg2+ and F- at equilibrium with solid MgF2 (Ksp of MgF2 = 6.4 x 10-9).
calculate the pv work done when 50.0 g of tin dissolves in excess acid at 1.00 bar and 25degrees celsius. assume ideal
A hypothetical atom has four allowed energy levels. As shown in the accompanying diagram, the emission spectrum of this atom will contain six transitions, labelled A - F.
An adult female who weighs 164 pounds consumes on average 2470 Cal/day. If she wanted to lose 5.00 pounds in 293 days, what should her daily caloric intake
before the civil war the south graded with the north and with england. it sold cotton and bought manufactured goods
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