A sample of oxygen initially at 350 K is heated to 450 K. If the initial volume of the gas was 1 L, what is the final volume (approximately)? (A) 1 L
b) 1.3 L
c) 2 L
d) 2.7 L

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

Explain what happens at the saturation point when adding salt to water at room temperature.

The comparison of the number of atoms in a copper coin the size of a penny with the number of people on earth is made to illustrate which of the following? a. that atoms are indivisible b. that atoms are very small c. that atoms are very large d. that in a copper penny, there is one atom for every person on earth