The answer is C.
EXPLANATION
Before Moseley's discovery, the atomic numbers (or elemental number) of an element had been thought of as a semi-arbitrary sequential number, based on the sequence of atomic masses.
The atomic mass of cobalt is slightly larger than that of nickel, which would have placed them in backwards order if they had been placed in the Periodic Table blindly according to atomic mass.
Moseley's experiments in X-ray spectroscopy showed directly from their physics that cobalt and nickel have the different atomic numbers, 27 and 28, and that they are placed in the Periodic Table correctly by Moseley's objective measurements of their atomic numbers.
Explanation:
inclined plane, lever , wedge , wheel and axle, pulley , and screw .
Answer:
9.8 × 10^21
Explanation:
Equation of the reaction;
Cd(s) + Ni^2+(aq) ----> Cd^2+(aq) + Ni(s)
E°cell= E°cathode - E°anode
E°cathode= -0.25 V
E°anode = -0.40 V
E°cell= -0.25 - (-0.40)
E°cell = 0.65 V
∆G= -nFE°cell
∆G= -(2 × 96500 × 0.65)
∆G = -125450 J
From;
∆G= -RTlnK
lnK = ∆G/-RT
K= e^∆G/-RT
K= e^-[-(125450/8.314 × 298)]
K= 9.78 × 10^21
When gas is dissolved in a liquid, more gas dissolves into the liquid. It states that when the pressure of the gas when dissolved in liquid increases, the solubility increases. Thus, the correct option is C.
<h3>What is Pressure?</h3>
Pressure may be defined as the amount of force devoted perpendicular to the surface of an object per unit area. The unit of pressure is Pascal or Pa.
The solubility of any solution is directly proportional to the pressure that is exerted on it at a given time. As the pressure increases, more the solute dissolves into the solvent.
Therefore, the correct option for this question is C.
To learn more about Solubility, refer to the link:
brainly.com/question/23946616
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Salts is the correct awnser