Which of the following is a physical change? (1 point) A) Turning a solid sodium and chlorine gas into salt
B) burning a piece of wood
C) Forming a mixture
D) Food turning into waste in the intestines

Maybe C.

Explanation:

A is a chemical change,

B is a chemical change

C is a physical change,

and D is a chemical change.

A physical change is when you combine something that you can take apart again, like salad.

A chemical change is when you combine something that you can't take apart, like Na + Cl = NaCl. It is incredibly difficult to take apart things at the atomic level!

Hope this helped!

first one is the correct answer

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