Julius went swimming at the lake. While he was playing on the shore, he found a rock and a stick, and he threw them both in the lake. The rock sank to the
bottom, and the stick floated on top of the water. What must be true about the
stick and the rock?

the rock is dencer than the water and the stick has more surface tension.

The rock is heaver so it sinks to the bottom of the lake, and the and the stick is lighter so it floats.

Hope this helps☺️

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

lol for the pointsss