The picture below shows a warm air mass caught between two cooler air masses. what is this type of front called? ?

Which of the following is true for the actual yield of a reaction? it is always calculated as a ratio. it is the yield from the excess reactant. it is the yield from the limiting reactant. it is always less than the theoretical yield.

When balancing a chemical equation:

Which change to the system wood cause the freely-moving piston to lower?