Answer:
1.98 M
Explanation:
Given data
- Initial volume (V₁): 93.2 mL
- Initial concentration (C₁): 2.03 M
- Volume of water added: 3.92 L
Step 1: Convert V₁ to liters
We will use the relationship 1 L = 1000 mL.

Step 2: Calculate the final volume (V₂)
The final volume is the sum of the initial volume and the volume of water.

Step 3: Calculate the final concentration (C₂)
We will use the dilution rule.

Answer:
The amount of NaF produced is doubled.
(d) is correct option.
Explanation:
Given that,
A 2 mole sample of F₂ reacts with excess NaOH according to the equation.
The balance equation is

If the reaction is repeated with excess NaOH but with 1 mole of F₂
The balance equation is

Hence, The amount of NaF produced is doubled.
(d) is correct option.
Actually mass and weight are two different things but most people did not understand the difference between them. And they are used synonymously on the earth. Mass is the measure of the amount of matter and weight is the measure of how the force of gravity acts on the mass that is Weight = mass x force of gravity. And they are also directly proportional to each other that is also the reason both terms are used synonymously.
Isoelectronic means equal number of electrons.
O+ is formed when the atom of O loses 1 electron.
The number of electrons of neutral O atom equals its number of protons.
Number of protons identifies the atomic number and position of the element in the periodic table.
The positon of O in the periodic table is A = 8, so it has 8 electrons and O+ has 8 - 1 = 7 electrons.
The neutral atom with one electron less than O is of the element to the left of O in the periodic table (A = 7). That element is N.
Therefore, the neutral atom isoelectronic with O+ is N (both have 7 electrons).