In atomic mass units, what is the average atomic mass of the atoms that make up boron (B) ?

A. 2

B. 5

C. 13

D. 10.81

Use the drop-down menus to complete the statement and describe how energy relates to work. transfers between objects.

What are the [H+] and [OH-] for a substance with a ph of 9.2?

Why are comets unlikely to be able to support life? A. A comet's environment is not stable. B. A comet does not have an atmosphere. C. A comet does not have a reliable energy source. D. all of these

Consider the following balanced equation for the following reaction: 15O2 (g) + 2C6H5COOH (aq) → 14CO2 (g) + 6H2O (l) Determine the amount of CO2 (g) formed in the reaction if the percent yield of CO2 (g) is 83.

A 25.0 mL sample of HNO3 solution requires 35.7 mL of 0.108 M Na2CO3 to completely react with all of the HNO3 in the solution. What is the concentration of the HNO3 solution?

How many valence electrons are in atom of sulfur?

My sister needs this answered! Donald is creating an experiment to determine if fertilizer affects plant color. He makes this statement: "If each plant receives a different amount of fertilizer, then the plant's color intensity will change.

What would happen to life if earth were in a different location within the solar system

Substance that undergoes a change in a chemical reaction is a. a product c. a reactant. b. a chemical. d. an enzyme.

List the number of protons, neutrons, and electrons in Iodine-127. (atomic number is 53)