<span>Volume increases at the same rate as temperature.</span>
Answer:
b) Delta S < 0
Explanation:
The change in the entropy (ΔS) is related to the change in the number of gaseous moles of the reaction: Δn(g) = n(g, products) - n(g, reactants).
- If Δn(g) > 0, the entropy increases (ΔS > 0).
- If Δn(g) < 0, the entropy decreases (ΔS < 0).
- If Δn(g) = 0, there is little or no change in the entropy
Let's consider the following equation.
2 H₂S(g) + 3 O₂(g) → 2 H₂O(g)
Δn(g) = 2 - 5 = - 3. Since Δn(g) < 0, the entropy decreases and ΔS < 0.
Explanation:
MWQ means the minimum weighable quantity.
Mathematically, MWQ = 
or, MWQ = 
It is given that sensitivity is 4.5 mg and maximum permitted error is 3.6%.
Therefore, fraction error = 
= 0.036
Hence, we will calculate MWQ as follows.
MWQ =
= 
= 125 mg
Thus, we can conclude that the MWQ of the given balance is 125 mg.
The gram-formula mass of Sm is 150.36 u, and the gram-formula mass of O is 15.999 u, so the gram-formula mass of SmO is about 150.36+15.999 = 160.36 g/mol.
So, there are about (9.30 * 10^-3)(160.36)=1.49 grams
<u>Answer:</u>
photoelectric effect and the modifications to the Rutherford model is necessary
<u>Explanation:</u>
Photoelectric effect refers to emission of electrons when a light of certain frequency falls into a metal surface or a metal atom.
Rutherford, through his alpha particle scattering experiment, proposed the emission of electrons, in which he used a thin gold foil and high energy alpha particle were directed to the foil. He suggested that any light can emit electron from any metal surface.
