Is a formation of a limestone cave a physical change?

A sample of nitrogen gas, occupies a volume of 400ml at 2 atm pressure. What pressure must be applied to compare the gas to a volume of 200ml at constant temperature and fixed amount of gas

The number 80 in the name bromine-80 represents a. the mass number. b. the sum of protons and electrons. c. the atomic number. d. none of the above.

What is the difference between condensation and accretion? a. A particle grows by condensation when it adds matter from a surrounding gas. Accretion is the sticking together of solid particles. b.

Water changes from a liquid to a gas in the process of evaporation. true or false

How many formula units of CaCO3 are present in 4.72 n of calcium carbonate?

Compare and contrast chemical potential energy and elastic potential energy

Which of the answer choices best describes how electrons move, according to modern atomic theory? They vibrate in place. They move like planets. They move in orbitals. They slide past each other.

The total solute concentration of a red blood cell is about 2%. Sucrose cannot pass through a red blood cell's plasma membrane, but water and urea can. Which of the following solutions will cause a red blood cell to shrink? a.

A geologist discovered fossils of marine animals in a layer of sedimentary rock in the desert. Based on this discovery, what conclusion can the geologist draw?

How do metals form chemical bonds with other metals?