When a liquid in a closed container reaches a state of equilibrium with its vapor,

a. the number of molecules in the vapor state and the liquid state are equal

b. the number of molecules evaporating and condensing are equal

Clare is a 14-year-old female who lives with her 29-year-old mother and three younger siblings in a two-bedroom apartment in a housing project. At school, Clare has acted out in class and has twice been held back a grade-level.

Calculate the amount of heat (in kJ) necessary to raise the temperature of 53.8 g benzene by 50.6 K. The specific heat capacity of benzene is 1.05 J/g°C Calculate the amount of heat (in kJ) necessary to raise the temperature of 53.8 g benzene by 50.

How many moles of nitrogen are in 3.7 moles of C8H11NO2?

What is a scientific claim

How to do balancing equations

Which of the following gases in Earth's atmosphere would you expect to find as molecules and which as individual atoms? a. Nitrogen b. Oxygen c. Argon

A substance that does not conduct electricity as a solid but does conduct electricity when melted is most likely classified as (1) an ionic compound (2) a molecular compound (3) a metal (4) a nonmetal

What is done with the reactive sodium after the reaction to make sure the products are safe in an air bag?

Which of the following does not indicate a chemical change? precipitate formation crushing a solid into a powder color change gas evolution

Reactions cannot occur without a certain minimum amount of energy. what is this minimum amount of energy called?