If an atom has 16 protons, 15 neutrons, and 19 electrons, what is the atom's electrical charge?

a. - 3

b. 1

c. - 1

d. 3

Which conditions apply at ph = 7.0? [h+] > [oh-]; the solution is acidic [h+] < [oh-]; the solution is basic [h+] = [oh-] = 0m [h+] = [oh-] = 1 * 10-7m?

If a sample of a certain solution is determined to have a [h3o+][h3o+] concentration of 4.91*10-44.91*10-4 moles/liter, what is its ph? round off your answer to one decimal place.

What is the percent concentration of a sodium fluoride solution made be dissolving 65.4 grams of sodium fluoride in 125.1 grams of water?

The table shown here lists the specific heat of several substances. Substance Specific heatJ/g/˚Cwater 4.18ethyl alcohol 2.44benzene 1.80sulfuric acid 1.

Briefly describe the movement of water through the water cycle

What is caused by the heating and coolingof the earth

How do the particlesthat make up an atom interact

A chemistry student needs 55.0g of dimethyl sulfoxide for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density of dimethyl sulfoxide is ·1.10gcm-3.

Explain what a alloy is and how the atomic structure of the alloy can make it stronger

Liz is examing a plant cell under a Microscope she seems many small green oranganelles inside the cell