HCl = 1 + 35.5 => 36.5 g/mol
hope this helps!
Q1. Chemical, Physical, Physical, Physical
(l am not 100% sure about the 4th answer)
Q2. All of the above
Physical properties include: appearance, texture, color, boiling point, melting point, ect.
Answer:

Explanation:
The specific heats of water and steel are


Assuming that the water and steel are into an <em>adiabatic calorimeter</em> (there's no heat transferred to the enviroment), the temperature of both is identical when the system gets to the equilibrium
An energy balance can be written as
Replacing

Then, the temperature 