How many Joules are required to heat 40g of water from 13°C to 40°C?
J

1080

Explanation:

you have to subtract 40 from 13 frist then multiply the remins of the temeture with 40 and your answer is 1080

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.

the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be