The crystal lattice structure of ionic compounds is responsible for which set of characteristics properties. A. Electrically charged, good conductor of heat and electricity, low melting and boiling point.

B. Good conductor of heat, ductile, malleable, high melting and boiling point.

C. Found in many states at room temperature, low melting and boiling point.

D. Liquid, flowing, alkaline, very low melting and boiling point.

E. Solid, hard yet brittle, very high melting and boiling points.

answer

fusion: the energy source of stars. the energy released from the collapse of the gas into a protostar causes the center of the protostar to become extremely hot. when the core is hot enough, nuclear fusion commences. fusion is the process where two hydrogen atoms combine to form a helium atom, releasing energy.

hope it

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.