A swimming-pool worker wants the pool's pH to be 7.2. She comes by to test the water and finds that the pH is 9.2. What should she do to correct this situation?

A. Add water.

B. Add base.

C. Add acid.

D. Do nothing.

A block of ice is cooled from - 0.5 degrees Celsius to - 10.1 degrees Celsius. Calculate the temperature change, delta T, in degrees Celsius and in kelvins.

Suppose a sample of air can hold at most 10 grams of water vapor. If the sample actually had 2 grams of water vapor, what is its relative humidity

Which electrons are lost by an atom of iron when it forms the Fe3 + ion? A. One s orbital electron and two d orbital electrons B. Two s orbital electrons and one d orbital electron C. Three s orbital electrons D. Three d orbital electrons

Medeleleev arranged the known chemical elements in a table according to increasing ... A) atomic number b) number of electrons c) number of protons d) mass

H20 goes to h30 + did it gain or lose a proton

Can dowels be chopsticks, since both of them are wood?

Which electron configuration represents the electrons in an atom of Ga in an excited state?

Why are there so many volcanoes in and around japan

A liquid fuel mixture contains 30.35% hexane (c6h14), 15.85% heptane (c7h16), and the rest octane (c8h18). what maximum mass of carbon dioxide is produced

What is the suns color