Use this website. It helps alot
https://www.webqc.org/balance.php
Answer:
Ionic crystal
Explanation:
An ionic crystal has a high melting point. In an ionic crystal, the ions are tightly held in electrostatic attraction by their oppositely charged neighbors forming a rigid three dimensional lattice. However, when this solid melts, the rigid crystal structure collapses and the individual ions become free and mobile. Hence the melt conducts electricity.
Explanation:
It is known that entropy is the measure of degree of randomness present in a substance due to the movement of its molecules.
More randomly the atoms are moving from one place to another more will be the entropy of system.
In order to calculate the entropy, we divide the amount of heat transferred by the temperature at which heat transfer occurs.
As the given temperature is 296.95 K and heat of vaporization is 24.8 kJ/mol. Therefore, calculate the molar entropy of vaporization as follows.
Molar entropy of vaporization =
= 0.08351 kJ/mol K
Thus, we can conclude that molar entropy of vaporization of is 0.08351 kJ/mol K.
The correct answer to this question is letter "A. homogeneous mixture." The following characteristics describe the type of mixture, which is a homogeneous mixture. The substance is mixed uniformly throughout and each part of <span>the substance contains the same ratio of materials with the same properties</span>
This problem is solved using following formula,
Molarity = Moles ÷ Volume of Solution ----- (1)
Data Given;
Volume = 650 mL = 0.65 L
Mass = 63 g
Solution:
First of all calculate moles for given mass,
Moles = Mass ÷ M.mass
Moles = 63 g ÷ 58.4 g.mol⁻¹
Moles = 1.08 mol
Now, putting values of mole and volume in eq. 1,
Molarity = 1.08 mol ÷ 0.65 L
Molarity = 1.66 mol.L⁻¹