How much ice (in grams) at 0 ∘C would have to melt to lower the temperature of 352 mL of water from 24 ∘C to 6 ∘C? (Assume the density of water is 1.0 g/mL.) Express your answer using two significant figures.

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.