Why do different compounds have different shapes?​

The presence of electrons that are not involved in bonding around the central atom, so-called 'lone pairs', are closer to the central atom, and as such repel electron pairs around them more strongly. ... This leads to the range of different shapes for the same number of electron pairs, as indicated in the graphic.

The presence of electrons that are not involved in bonding around the central atom, so-called 'lone pairs', are closer to the central atom, and as such repel electron pairs around them more strongly. ... This leads to the range of different shapes for the same number of electron pairs, as indicated in the graphic.

away from the curb

explanation:

the wheels would then hit the curb if it started to rolling, decreasing the chance of an accident.

given:

mass of na = 115 g

excess cl2

to determine:

mass of nacl produced

explanation:

given reaction is-

2na(s) + cl2(g) → 2nacl(s)

since cl2 is in excess, na will be the limiting reagent

as per the reaction stoichiometry na: nacl = 1: 1

i.e. moles of na reacted = moles of nacl formed

now, # moles of na = mass of na/atomic mass

                                  = 115 g/23 g.mol-1 = 5 moles

therefore, moles of nacl = 5

molar mass of nacl = 58 g/mol

mass of nacl = 5 moles * 58 g.mol-1 = 290 g

ans: amount of nacl produced = 290 g