Explanation

pOH is defined as the negative logarithm of the hydroxide ion concentration: pOH = -log[OH⁻].

It is used to measure the basicity of a solution, similar to how pH measures acidity.

Explanation

Molar mass of CO₂ = 12 (C) + 16×2 (O) = 44 g/mol

Number of moles = Mass / Molar mass = 60 / 44 ≈ 1.364 mol

Explanation

The preposition "at" is used to indicate a specific time.

So, "I will come at 2 o'clock" is grammatically correct.

Explanation

The use of "will" here shows willingness to help someone.

It expresses a voluntary action or offer.

Explanation

Variance measures the spread of data around the mean.

For a constant number, all values are the same, so there is no variation, making variance 0.

Explanation

The phrase "Allahumma fiqqih-hu fid Deen" is a du'a (supplication) meaning "O Allah, give him deep understanding of the religion."

It is often made for students or children to excel in religious knowledge.

This du'a (supplication) was made by the Prophet Muhammad ﷺ for Ibn Abbas (RA).

Explanation

A sequence is a function whose domain is the set of natural numbers (1, 2, 3, ...).

Each natural number input gives a specific term in the sequence.

Explanation

Explanation

A compound is a pure substance formed when two or more different elements chemically combine in a fixed ratio.

Examples include water (H₂O) and carbon dioxide (CO₂).

Explanation

To find the range, subtract the smallest value from the largest value:

Maximum value = 28

Minimum value = 20

Range = Maximum value - Minimum value

= 28 - 20

= 8