The periodic law states that the physical and chemical properties of elements are periodic functions of their?

1 answer:

6 0

<span>The periodic law states that the physical and chemical properties of elements are periodic functions of their "Atomic Numbers"

So, option B is your answer.

Hope this helps!
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What is the density of ammonia (NH3) at 293 K and 0.913 atm?

Anastaziya [24]

Answer: The density of Ammonia is 0.648 g/l

Explanation:

Density = Mass/ Volume

Mass of one mole of Ammonia (NH3) = 17.031g

Volume =?

Using the ideal gas law we can determine the volume.

PV = nRT

P = 0.913 atm, V= ?, n = 1, R = 0.08206 L.atm/K, and T= 293K

Make V the subject of the formular, we then have;

V= nRT/ P = 1 mol x 0.08206 L.atm/ K.mol x 293 / 0.913 atm

V = 24.04358/ 0.913 = 26.3L

Having gotten the value of Volume in this question, we then go back to solve for density.

Density = Mass/ Volume

17.031g/ 26.3L = 0.64756 ≈ 0.648 g/l

7 0

3 years ago

Consider the words or phrases below and drop them in the bucket that you would most associate with the word or phrase in the the

Dimas [21]

Answer:

1) non equilibrium

mass movement

unsaturated solution

2)equilibrium phase change

Heat of vaporization

condensation

heat of fusion

normal boiling point

vapor pressure

3) equilibrium reaction

saturated solution

Ksp

solubility

Explanation:

Nonequilibrium processes are those processes that are irreversible. They often lead to an increase in entropy of the system.

In chemical systems, a state of equilibrium is said to have been attained when the rate of the forward process equals the rate of the reverse process. This is true for both chemical reaction and phase changes. A state of equilibrium connotes a constancy in physical properties of a system over a period of time.

7 0

3 years ago

The vapor pressure of ethanol is 30°C at 98.5 mmHg and the heat of vaporization is 39.3 kJ/mol. Determine the normal boiling poi

Gelneren [198K]

Answer : The normal boiling point of ethanol will be, $348.67K$ or $75.67^oC$