A student was learning about elements. Which best describes elements? A. They cannot be combined with other substances.
B. They cannot be categorized as metals.
C. They cannot be broken down into simpler substances.
D. They cannot be separated from other substances.

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

According to the kinetic-molecular theory, what happens to a liquid when it is transferred from one container to another? the volume and the shape stay the same. the volume increases to fill the new container, but the shape stays the same. the volume stays the same, but the shape changes to fit the new container. the volume and the shape change to fill the new container.

Which is the solubility product expression for caf2(s)?  [ca2+]/[f–]2  [ca2+][f2–]  [ca]+[f]2  [ca2+][f–]2