a solution contains 10.0 g pentane, c5h12, 20.0 g hexane, c6h14, and 10.0 g benzene, c6h6. what is the mole fraction of hexane?
a) 0.303
b) 0.471
c) 0.433
d) 0.362
e) 0.335

An atom of lithium-7 has an equal number of(1) electrons and neutrons(2) electrons and protons(3) positrons and neutrons(4) positrons and protons

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?

Which of the following is the correct definition of chemical energy? a. energy an object has because of its motion or position b. energy resulting from the flow of charged particles, such as electrons or ions c. energy produced from the splitting of atoms d. energy stored in chemical bonds of molecules