Which of these best explains the ability of small insects to walk on the surface of still water? a.) water molecules at the surface experience fewer hydrogen bonds than water molecules within the liquid b.) the insects’ feet are coated with ionic compounds c.) water has a very high specific heat d.) water molecules near the surface produce more buoyant force than water molecules within the liquid the answer was not d.

A.

Explanation:

Smaller insects can walk on water due to surface tension. The force that a smaller insect makes on the water is less than the water and as such the bug will "float."

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h let me think

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