Is the quantity of heat needed to convert a fixed mass of liquid at a fixed
temperature to the gaseous state.
A. Heat of sublimation
B. Heat of pressure
C. Heat of viscosity
D. Heat of vaporization

Ascientist measures the speed of sound in a monatomic gas to be 449 m/s at 20∘c. what is the molar mass of this gas?

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided

If two identical atoms are bonded,what kind of molecule is formed