What is the best definition of the enthalpy of vaporization, A Hvap? A. The change in the disorder of a system when a liquid changes to a
gas
B. The energy needed to raise the temperature of a liquid to the
boiling point
C. The change in the disorder of a system when a molecule forms
from its atoms
D. The energy needed to change a liquid into a gas

The speed of light is around 6.706×10^8 miles per hour. what is the speed of light in units of miles per minute?

Astudent made the lewis dot diagram of a compound shown. what is the error in the lewis dot diagram? a)an o atom should transfer all of its six electrons to mg because the formula is mgo b) both electrons of mg should be transferred to one o adam because the formula is mgo c) the electrons should be transferred from each o add him to capital mg because mg has fewer electrons d) the number of dots around mg should be four because it has to transfer two electrons to each o

The climate of the continental united states is generally 1. tropical 2. temperate 3. arctic 4. highland