Which of the follwing is a pure substance: sugar, salt, water, or pepper? Explain how you know.

While on a road trip, Mac observed the gas tank gauge drop from full to empty. What most likely happened to the energy from the gas in the gas tank?

When a person uses a iron to remove wrinkles from a shirt. Why does heat travel from iron to the shirt

Is the expansion of chlorine a physical or chemical change?

Enter the net ionic equation to show the reaction of aqueous lead (II) nitrate with aqueous potassium sulfate to form solid lead (II) sulfate and aqueous potassium nitrate.

What is the molarity of a solution made by dissolving 68.4g of NaOH in enough water to produce a 875 ml solution?

TRUE OR FALSE A stable mixture of two or more mixable substances is called an emulsion

A chemical engineer is developing a process for producing a new chemical. One step in the process involves allowing a solution of potassium hydroxide to react with a solid. Which action would most likely increase the reaction rate for this step?

Determine which elements are balanced and unbalanced for each chemical equation below when every compound is given a coefficient of one.

A scientist has two solutions, which she has labeled Solution A and Solution B. Each contains salt. She knows that Solution A is salt and Solution B is salt. She wants to obtain ounces of a mixture that is salt.

Reactions that affect the nucleus of an atom are called? A. Fusions B. Radioactive decays C. Nuclear reactions D. Fissions