Which best describes a compound?

O A elements that are chemically combined

B

elements that are physically combined

c. elements that can be broken down into atoms

D. elements that cannot be broken down into atoms

When solid (NH4) (NH2CO2) (NH4) (NH2CO2) is introduced into and evacuated flask at 25∘C25∘C, the total pressure of gas at equilibrium is 0.30.3 atm. What is the value of Kpat25∘CKpat25∘C?

What is the difference between a pressurized water react door and boiling water reactor A. A pressurized water reactor does not use fission B. A pressurized water reactor boils the water faster C.

A sunstance forms when positively charged particles and negatively charged particles attract eachother. the substnce is ... a molecular compound an ionic compound an element the question cant be answered with the information given

Why is fusion nuclear energy currently not widely used as a source of electricity? Fusion reactions have not yet been achieved. Fusion reactions cannot be controlled. Fusion reactions require very high temperatures and pressure.

Electrons are never found in - a. energy levels. b. energy shells. c. a nucleus. d. an electron cloud.

What are the cations and anions for V2 (CO3) 3

If you were asked to convert 4.2 x 1022 atoms of aluminum to moles, which of the following should you use for the conversion?

Carbonic acid (H2CO3) does not dissortate 100 percent in water. What type of substance is it? weak acid Strong base strong acid weak base

The standard enthapy of combustion of solid urea co (nh2) 2 is - 632kjmol-1 at 298k

What happens to an isotopes during radioactive