General Chemistry Answers

If the theoretical yield of the reaction is equal to 267.0 grams of AlBr3, what is the percent yield of the reaction if the actual yield is 250.0 grams of AlBr3?

The standard enthalpy of the reaction: CO(NH2)24) + H20) -› CO2(g) + 2 NHa(a) is -133.42 kJ/mol. Calculate

the standard enthalpy of formation of urea, CO(NH2)2(6).

Aqueous sulfuric acid (H2SO4) will react with solid sodium hydroxide (NaOH) to produce aqueous sodium sulfate (Na2SO4) and liquid water (H2O). Suppose 90. g of sulfuric acid is mixed with 127. g of sodium hydroxide. Calculate the maximum mass of water that could be produced by the chemical reaction. Round your answer to 2 significant digits.

. Calculate pH of a 0.350 L solution that was prepared by dissolving of 2.9 g of Mg(OH)2

Which of the following order(s) is/are correct for the indicated ionization energy?

O > N > B > C (IE₂)

F > Cl > Br > I (IE₂)

N > C (IE₃)

B > Ga (IE₁)

calculate the percent by volume of the disinfectant aki made. Units in mL

Exercise. Given the equation, calcite the standard free energy change. Answer what is being asked.

1. N2(g)+3H2(g) --->2NH3(g)

If ΔH = -92.2kJ and ΔS= -0.1987kJ/K, what is ΔG for the reaction at 475°C and at 5°C? Provide the answer in kJ. In each case, is the reaction spontaneous?

2. The enthalpy and entropy change of a reaction are -3.9 kJ/mole and +56.6 J/mole K respectively at 25o C. What is the free energy change in kJ/mole? Is this reaction always spontaneous, never spontaneous or does it depend on the temperature?

When 0.149 g of lactic acid is combusted in a constant volume calorimeter in an excess of oxygen, only CO2 and water are products and 2.24 kJ of energy is released. If the heat capacity of the calorimeter is 0.827 kJ/K and the initial temperature was 23.44 °C, what is the final temperature in °C?

Calculate the theoretical yield of aluminum chloride (in grams) that can be produced from 10.00 grams of aluminum metal.  

emperical formula of C6H6