Which of the following is considered a greenhouse gas?

A. argon

B. oxygen

C. nitrogen

D. water vapor

Which substance are mostly likely acids

Which reactions are endothermic? (Select all that apply.) A. H2 (g) + ½O2 (g) H2O (aq), H = - 57.83 kcal/mole B. ½ N2 (g) + ½O2 (g) NO (g), H = + 21.6 kcal/mole C. ½N2 (g) + O2 (g) + 8.1 kcal NO2 (g) D. ½N2 (g) + 3/2 H2 (g) NH3 (g) + 11.

What can happen when a fission chain reaction gets out of control?

In which compound does sulfur have an oxidation number of - 2

What is the mass of an electron? A. Electrons do not have mass. B. - 1.0 amu C. 0.0005 amu

Question 6 if a gas pressure gauge reads 32.0 psi, what is the pressure in inches of mercury? 165 in. hg 15.7 in. hg 65.1 in. hg 32.0 in. hg 6.19 in. hg

A line in the Brackett series of hydrogen has a wavelength of 1945 nm. From what state did the electron originate?

Convert 4.5 hours to seconds

Gasoline catches on fire is it flammability?

Enzymes are proteins that speed up chemical reactions in the body how do they work A. they increase the surface area of reactants B. they increase the concentration of reactants C. they decrease the concentration of products D. They act as reactants