Melanie has to purchase a book for $200 and the study guide that goes with the book cost $31.5. If the sales tax is 8.25% what will be the amount of sales tax on Melanie's purchase

The poisonous solvent contained in elixir sulfanilamide was

Which of the following does not increase the rate at which a solid dissolves in water? a. raising the temperature of the water b. stirring the solution c. using large pieces of the solid d. crushing the solid

Chemistry is best defined as the study of what

Which statement best describes how Carl Woese changed the system of classification? He removed a level and a kingdom. He added a level and a kingdom. He removed a level and added a kingdom. He added a level and removed a kingdom.

Which of these is outside of the solar system?

A solution of orange juice that weighs 500 g contains liquid juice and solid pulp. All of the pulp is removed from the juice. The pulp is found to weigh 50 g. How much would the remaining liquid juice weigh? A. 50 g B. 250 g C. 450 g D. 500 g

Assume 3 molecules of Fe react according to the following equation. 3Fe + 4H2O Fe3O4 + 4H2 How many molecules of H2 are produced? How many water molecules are required? What is the mole ratio of Fe to H2O?

10.0 mL of a HF solution was titrated with a 0.120 N solution of KOH; 29.6 mL of KOH were required to completely neutralize the HF. Calculate the normality of the HF solution.

The number of grams present in 1.35 mol of Fe is

Which can associate a suspect's gun with a crime?