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Potassium bromide KBr contains 32.9% by mass potassium. If 6.40 g of bromine reacts with 3.60 g of potassium, calculate the number of moles of potassium which combine with bromine to form KBr.
Problem- How much heat (in J) is evolved or absorbed when a 35.4 g sample of aluminum (specific heat = 0.900 J/(g K)) cools from 88.4oC to 71.9oC
which one of the following molecules has a zero dipole
If density of ethanol is 0.789 g/ml what is the concentration of 5 grams benzene (c6h6) dissolved into 50 grams ethanol (c2h5oh)?
Consider the hypothetical reaction, A + B ® C, with the rate law, Rate = k[A]2[B]. If the concentration of A is 0.650 mol/L, the concentration of B is 0.100 mol/L, and the rate is 1.70 M/min, calculate the rate constant,
A first order reaction has a rate constant of 2.75 X10-5 s-1 at 30 Celsius. Explain what is the frequency factor if the activation energy for the reaction is 8.02 kj/mol? R=8.314 J/mol K
The active ingredient in Pepto-bismol is bismuth subsalicylate, C7H5BiO4. Analysis of a 1.500-g sample of Pepto-Bismol yields 346 mg of bismuth. What percent by mass is bismuth subsalicylate. (Assume that ther is no other bismuth containing compou..
Question- Write the mechanism for the elimination of 2-bromo-2-methybutane using KOtBu that shows each of the two possible products?
Assuming that the heat capacity of the ammonuim chloride solution is 4.18J/gc, calculate the heat (enthalpy) of the solution NH4Cl, (a) in J/g and (b) in kj/mol.
what is the percent by mass of a solution on made by dissolving 163 grams of table sugar in 755 grams of water.
an ideal solution is created by mixing a and b in the molar ratio 23. the mixture has a normal boiling point at 85
The stack gas contains C02 at a partial pressure of 80 mm Hg and no CO,O2, methane or ethane. Calculate the mole fraction of methane in the fuel and the dew point temperature of the stack gas.
If the total volume of the jewelry is the sum of the volumes of the gold and silver that it contains, calculate the percentage of gold (by mass) in the jewelry.
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