Two pans of water are on different burners of a stove. one pan of water is boiling vigorously, while the other is boiling gently. what can be said about the temperature of the water in the two pans?

the water in the two pans are at 100°C

Explanation:

Pure water boils at the temperature of  100°C,the reason while one of the water boils vigorously and the other boils gently is a function of the quanitity of heat energy acquired by the water molecules,but both water are at the same tempearture of 100°C.

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