How can humidity be used to predict if it is going to rain?
a low humidity means that it is going to rain.
a high humidity means that it will not rain.
a high humidity increases the chance it will rain.
humidity cannot be used to predict rain.

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.