What defines the mass number of an isotope? the sum of the neutrons and protons the sum of the neutrons and electrons the number of neutrons the number of protons

What happens when you add baking soda to ice

A teacher wants to prepare a 0.010 ppm solution of arsenic pentoxide in the laboratory for calibrating a water quality testing system. If the teacher uses 500.0 mL of water (which has a mass of 500.

A student took 100 ml of a solution of mg (oh) 2 and reacted it with h2so4 (aq) to calculate the concentration of hydroxide ions in the solution. if 13.75 ml of 0.

A chemical solution contains 2% salt. how much salt is in 4 ml of solution?

What is the molar mass for a gas that effuses 0.344 times as fast as hydrogen gas?

Which of the following reactions are redox reactions? a. Al (s) + 3Ag + (aq) →Al3 + (aq) + 3Ag (s) b. SO3 (g) + H2O (l) →H2SO4 (aq) c. Ba (s) + Cl2 (g) →BaCl2 (s) d. Mg (s) + Br2 (l) →MgBr2 (s)

How many liters of water are required to dissolve 1.00 g of barium chromate? express your answer in liters to three significant figures?

Cartography is the science of

If a sample of gas occupies 400 ml at a pressure of 800 mm Hg, what will be it's volume if the pressure is reduced to 700 mm Hg

Why are water storage tanks usually built on towers or hilltops?