Which of the following is used in pencils?

A. Graphite

B. Silicon

C. Charcoal

D. Phosphorous

Which of the following metals forms an amalgam with other metals?

A. Tin

B. Mercury

C. Lead

D. Zinc

Which of the following can produce deadly gases when mixed together? a. alcohols b. gasoline and water c. household cleaners d. window cleaner and water

A sample of an unknown substance is decomposed and is found to be 59% strontium (Sr), 8.0% carbon, and 33% oxygen. What is its empirical formula?

Which of the following is altered by a catalyst? A. difference between the energies of products and reactants B. average kinetic energy of products C. average kinetic energy of reactants D. activation energy

What is the only chemical that is liquid at room temperature

An oxidation-reduction reaction involves the (1) sharing of electrons (2) sharing of protons (3) transfer of electrons (4) transfer of protons

Biofuel is any fuel that is produced from living or once living matter in a short period of time, days, weeks, or even months.

How are revolution and year related

Read the scientific question below. "Does sunlight make plants live?" What is a likely hypothesis for the question?

A chemist is using a solution of HNO3 that has a pH of 3.75. What is [H+] for the solution?

What is the oxidation number for CO2