Which of the following is/are TRUE about heat transfer? w. heat energy can never be transferred.

x. heat flows from cooler to hotter object.

y. heat travels from hotter to cooler object.

z. heat can transfer through convection, conduction, and radiation

Group of answer choices

x and y

y and z

w and z

w and x

Which type of reaction always has an element and a compound as reactants

Liquid ammonia is produced at high temperatures and under great pressure in a tank by passing a mixture of nitrogen gas and hydrogen gas over an iron catalyst. the reaction is represented by the following equation. n2(g) + 3h2(g) → 2nh3(g) changing all but one experimental condition will affect the amount of ammonia produced. that condition is a) increasing the concentration of both reactants b) changing the temperature within the tank c) decreasing the pressure within the tank. d) increasing only the amount of nitrogen present.

Which subshell is represented by the actinides family?