Finn is investigating how energy affects objects. He adds energy to an object as shown. Will the energy he has added cause the object to move?

no, because the light energy from the battery will change its mass

no, because heat energy from the battery will change its temperature

yes, because the battery’s mechanical energy will make the motor run

yes, because the battery’s electrical energy will make its wheels turn

yes because the battery's electrical energy will make the wheels turn.

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