If a sample contains 21.2 g N, how many moles of N does it contain?

0.66 mol

1.51 mol

14.01 mol

297.01 mol

The temperature of evaporation is much higher for water than for alcohol. Without knowing more about the chemistry of alcohol, which of the following is the most logical chemical explanation for this phenomenona.

Which organ (s) would be responsible for this trait? Select two options.

Consider the reaction IO-4 (aq) + 2H2O (l) ⇌H4IO-6 (aq); Kc=3.5*10-2 If you start with 26.0 mL of a 0.904 M solution of NaIO4, and then dilute it with water to 500.0 mL, what is the concentration of H4IO-6 at equilibrium?

All living organisms are composed of at least 100 cells. one or more cells. only one cell. at least three cells.

An unknown substance is a yellow gas at room temperature. Is this substance ionic or covalent? How do you know?

The correct mathematical expression for finding the molar solubility (s) of sn (oh) 2 is:

18. which bond is most polar? H--F H--Cl H--Br H--I

What kind of reaction is ca (s) + h3po4 (aq) ca3 (po4) 2 (s) + h2 (g)

In the teapot dome scandal, what did the secretary of the interior albert fall lease

A Material made of equal parts is called what? A. Atom, B. Pure substance, C. Mixture