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An 18.0 g sample of magnesium is completely burned in the presence of air to form magnesium oxide. What is the mass of magnesium oxide obtained?
The Ka of a monoprotic weak acid is 6.08 × 10-3. What is the percent ionization of a 0.187 M solution of this acid
calculate delta G foor the combustion of ethane: 2C2H6(g) + 7O2(g) = 4CO2(g) + 6H2O(l)
A balloon is inflated with 0.2494g of helium to a pressure of 1.26 atm. If the desired volume of the balloon is 1.25L, what must the temperature be in degreeC
assume that the activation energy for a certain reaction is 173 kjmol and the reaction is started with equal initial
Because eugenol is insoluble in water, both eugenol and water co-distill in a process called steam distillation. In steam distillation, the boiling point of the distillate is below the boiling point of either component.
what is the pH of a Tris buffer (pka 8.1) prepared by adding 20 mL of 1M HCl to 100mL of a solution of 0.3M Tris
Given pKa (acetylene) = 25 and pKa (H2) = 35, predict whether the direction/ position of equilibrium in the following reaction will lie to the right (favors the forward reaction) or to the left (favors the backward reaction)?
Suppose a snack bar is burned in a calorimeter and heats 2,000 g water by 20 °C. How much heat energy was released? (Hint: Use the specific heat equation.) Give your answer in both joules and calories.
When 0.89 g ZnCl2 is dissolved in 280. mL of 0.150 M NaCN, what are [Zn2+], [Zn(CN)42- ], and [CN- ] [Kf of Zn(CN)42- = 4.2 multiplied by 1019]
determine the pressure inside a container of a gas connected to an open-end manometer filled with ccl4 has the density
7.0and 1.00atm pressure what will the volume be if the preassure is increased at 50.0atm
Consider the following chemical equation. Cl2(g) + O2(g) ? Cl2O3(g) Assuming all gases are at the same temperature and pressure, how many milliliters of oxygen gas must react to give 3.00 L of Cl2O3
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