Answer:- d) 42 kJ of heat is released and the reaction is exothermic.
Solution:- Heat of reaction is the summation of heats of products - reactants.
![\Delta H_r_x_n=\sum [products-reactants]](https://tex.z-dn.net/?f=%5CDelta%20H_r_x_n%3D%5Csum%20%5Bproducts-reactants%5D)
From given information, the energy contained by products is 352 kJ and the energy contained by reactants is 394 kJ. Let's plug in the values in the formula:
= [352 kJ - 394 kJ]
= -42 kJ
Heat of reaction is -42 kJ. The negative sign indicates the heat is released means the reaction is exothermic.
So, the correct option is the last one, 42 kJ of heat is released and the reaction is exothermic.
Dipole-dipole interactions, and London dispersion interactions
Answer: The percent ionization of 
in a 0.050 M 
solution is 8.9 %
Explanation:
cM 0 0
So dissociation constant will be:
Give c= concentration = 0.050 M and 
= degree of ionisation = ?
Putting in the values we get:
percent ionisation =
The density of a liquid is the ratio of its mass to its volume. It is an extensive property even though mass and volume are both intensive properties. At a certain temperature and pressure, the density of a liquid is constant. The solution is as follows:
Density = Mass of liquid/Volume of liquid
Mass of liquid = Mass of liquid and cylinder - Mass of cylinder
Mass of liquid = 12 g - 10.8 g = 1.2 g
Density = 1.2 g/7.4 mL
Density = 0.162 g/mL
