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Describe how you would purify p-nitrobenzoic acid from a mixture of a 9.0 g of p-nitrobenzoic acid and 2.0 g of o-nitrobenzoic acid using recrystallization. Tell which solvents you would use and how the components would get separated.
Sulfur-38 has an atomic mass of 38.0 and a half-life of 2.87 hours. How long will it take for 99.99% of a sample of sulfur-38 to decay.
How much 10.0 M HNO3 must be added to 1.00L of a buffer that is 0.001 M acetic acid and 0.1 M sodium acetate to reduce the pH 5.45? (pKa of acetic acid = 4.75)
How many grams of aqueous iron bromide will be needed to react with an excess of potassium phosphate,K3PO4,to produce 17.1 g of solid iron phosphate?
State the most likely primary alcohol and hydrogen halide needed for the preparation of 1 bromoheptane.
determine the numerical values for them the subscript hot, cold, and total stands for the hot brick, the cold brick and the sum of the two.
If the reaction 4NH3 + 5O2 yeilds 4NO + 6H2O uses 824 g NH3 and excess oxygen, how many moles of NO are formed?
How many independent linear combinations are possible for four 1s orbitals? (b) Draw pictures of the linear combinations of H1s orbitals for a hypothetical linear H4 molecule
An 1.07 mol sample of carbon dioxide gas at a temperature of 8.00 oC is found to occupy a volume of 22.7 liters. The pressure of this gas sample is
A catalyst decreases the activation energy of a particular exothermic reaction by 59 kJ/mol, to 51 kJ/mol. Assuming that the mechanism has only one step, and that the products are 94 kJ lower in energy than the reactants
In the laboratory, a student named Georgia weighed 4.75 grams of an unknown solid mixture containing benzoic acid, copper (II) sulfate and sand. She added 15mL of acetone to her sample. Which component of the mixture is dissolved in the acetone?
A 25.0 mL sample of 0.150 M nitrous acid is titrated with a 0.150 M NaOH solution. What is the pH at the equivalence point? The Ka of nitrous acid is 4.50 x 10-4.
Sulfuric acid (H2SO4) is a very strong diprotic acid. If 0.076 moles of sulfuric acid is mixed with water to make 670 mililiter of solution, what is the molarity of H+?
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