Which is the best name for the compound CaSO4•2H2O?

hydrated calcium sulfate

calcium sulfate trihydrate

calcium sulfate dihydrate

anhydrous calcium sulfate

Which of the following statements is true about the atoms of any element: a. They have the same number of protons as the atoms of all other elements. b. They have protons that are identical to the protons of all other elements. c.

A balloon filled with 1.22 l of gas at 286 k is heated until the volume is 2.86 L while the pressure remains constant. What is the temperature of gas in Kelvin. Round to nearest whole number

What type of reaction is C 12 H 22 O 11> 12C+11H2O

If a gaseous mixture is made by combining 1.55 g Ar and 1.80 g Kr in an evacuated 2.50 L container at 25.0 ∘ C, what are the partial pressures of each gas, P Ar and P Kr, and what is the total pressure, P total, exerted by the gaseous mixture

Two charged balloons 2.1 * 10-1 meters apart have a repulsive force of 1.3 * 10-1 newtons. The charge on one balloon is 8.2 * 10-7 coulombs. What is the charge on the other balloon? (k = 9.0 * 109 newton·meters2/coulomb2) 7.7 * 10-7 coulombs 8.

How can a neutral atom become a positively-charged particle?

The last column of the periodic table contains the noble gases, elements that do not easily form chemical bonds.

When pollution is removed from the air by a natural process, it

What atomic property is different in each isotope of an element?

How do carbon-12 and carbon-13 differ? Select all that apply. They have different amounts of neutrons. They have different atomic charges. They have different mass numbers. They have different amounts of electrons.