Calculate the amount of heat required to heat a 3.3 kg gold bar from 26 ∘c to 69 ∘c. specific heat capacity of gold is 0.128 j/g∘c.

What are the first three quantum numbers for the electrons located in subshell 2s?

How is the solubility of a carbon dioxide gas in water increase?

Two changes are described below. a green banana turns yellow and ripens. a layer of rust forms on an iron nail. which statement is true about the two changes? a) both are chemical changes because new substances are formed. b) both are physical changes because only the physical state of the substances change. c) a is a physical change due to a change of state, but b is a chemical change because new molecules are formed. d) a is a chemical change due to a change of state, but b is a physical change because new molecules are formed.