Plz ! which of the following statements is true?

a. one lithospheric plate can slide below another one at a convergent plate boundary.
b. lithospheric plates never come close to each other.
c. one lithospheric plate can slide below another one at any place.
d. a lithospheric place cannot slide below another one anywhere.

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.