Liquid nitrogen is very cold. At room tempature it changes into a gas. This is an example of:

A) Evaporation

B) Sublimation

C) Melting

D) Boling

(Its not answer b)

A newly isolated natural product was found to have the molecular formula C15H28O2. By hydrogenating a sample of the compound, it was determined to possess one π bond. How many rings are present in the compound?

Nitrogen and hydrogen combine at a high temperature, in the presence of a catalyst, to produce ammonia. N 2 (g) + 3 H 2 (g) ⟶ 2 NH 3 (g) Assume 0.140 mol N2 and 0.434 mol H 2 are present initially.

What are elements that bond to form binary covalent compounds? a) nonmetals b) metals

What was John Dobereiner's contribution to the development of the periodic table

How can looking at the crystal size tell you where an igneous rock formed?

Silver chromate is sparingly soluble in aqueous solutions. the ksp of ag2cro4 is 1.12 * 10-12 m3. what is the solubility (in mol/l) of silver chromate

What do you think 1,5-pentanedithiol C5H12S would smell like

If an atom has sp hybridization in a molecule: the maximum number of σ bonds that the atom can form is

What is an oxidizing agent?

In times of hot dry weather some cities ban the use of garden sprinklers why do you think there is such a rule