Which of these substances would you expect to have the lowest melting point?

a. sodium chloride
b. silicon dioxide
c. sodium hydroxide
d. paraffin

0.2348 grams of pbcl2 used to form 44.0 ml of solution.

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.

In medium-sized stars such as the sun, nuclear fusion almost always means the fusing of nuclei to form , but larger stars can produce elements as heavy as