What might be a good way of quickly telling if something is an element or a compound

According to Pascal's principle, how does pressure from a hand squeezing a ketchup bottle move throughout the ketchup?

Atoms bond due to the interactions between 1) protons and neutrons 2) protons and electrons 3) neutrons and electrons 4) neutrons and positrons

To which period does the Lanthanide series belong? Actinides?

The temperature of the cooling water as it leaves the hot engine of a certain automobile is 244°F. After it passes through the radiator it has a temperature of 177°F.

Which one of the following melts the fastest: rectangular prism, cylinder, and rectangular trapezoidal trough?

Number of hydrogen atoms in NaC2HO4

Calculate the pH for an acid that has a [H+] of 5.8 x10^-11 M.

Complete the lewis dot structure for h2co (in which both h atoms are bonded to c).

Do substances have to be cold to freeze?

Which statement is true of the carbon atoms that make up a diamond? A. They can slip past one another slowly. B. They are always vibrating in place. C. They vibrate only when they are heated. D. They are locked in place and do not move at all.