Answer:
Molarity = 0.2 M
Explanation:
Given data:
Number of moles of NaCl = 13 mol
Volume of solution = 65 L
Molarity of solution = ?
Solution:
Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.
Formula:
Molarity = number of moles of solute / L of solution
now we will put the values in formula.
Molarity = 13 mol / 65 L
Molarity = 0.2 mol/L
mol/L = M
the last one
A. No, because we are not given specific values for w and q.
The change of internal energy of a system is:
ΔE = q + w
where q represents heat and w represents work.
It is necessary to know the magnitude and the sign of q and w in order to know if the system's internal energy is increasing or decreasing.
154.5+224.4=378.9m
