An isotope of mercury has 80 protons and 120 neutrons. What is the mass number of this isotope.

Rain, freezing rain, sleet, snow, and hail are all examples of a. infiltration. b. precipitation. c. evaporation. d. condensation.

Describe what happens to the size of atoms of the elements as you go across a row and down a column in the periodic table. explain why each of these trends exists

A bicycle completed the first 500.0 m of a ride in 99.8 s. What was the bicycle's average speed in kilometers per hour?

Which element, if combined with sulfur, will have the greatest attraction for the sulfur electrons?

A chemist reacts 8.85 g of iron with an excess of hydrochloric acid to form hydrogen gas and iron (II) chloride. Calculate the theoretical yield and the percent yield of hydrogen if 0.27 g of H2 are collected. TY = g H2 PY = %

Using density what is the mass in grams of 150mL of a liquid with a density of 1.4 g/mL

All of the following can be recycled except clothing aluminum cans compact fluorescent bulbs plastic drink bottles

Use Henry's law and the solubilities given below to calculate the total volume of nitrogen and oxygen gas that should bubble out of 1.0 L of water upon warming from 25 ∘C to 50 ∘C.

Washing soda, a compound used to prepare hard water for washing laundry, is a hydrate, which means that a certain number of water molecules are included in the solid structure.

When you light a fire place what energy transformation takes place