Use the hydrogen phase diagram to answer the question.

What is the boiling point of hydrogen at atmospheric pressure (1.0 × 105 Pa)?

12 K

33 K

14 K

20 K

Suppose you got a low yield of benzoin from your benzoin condensation reaction and thus only have 0.300 g of benzoin to use as the starting material for this reaction. how much concentrated nitric acid should you add? (concentrated nitric acid is 15.8 m). write your answer in the form x.xx ml

If 1.8 l of water is added to 2.5l of a 7.0 m koh solution, what is the molarity of the new solution

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.