Category Archives: General

How to convert weight percent to mole fraction

In this post , we will be checking out how to convert weight percent to mole fraction and what is weight percent or mass percent Weight percent or mass percent is defined as the weight of the solute in 100 gm of the solution $Weight \; percent= \frac {mass \; of \; the \; solute}{mass \; of \; the \; solution} \times 100$ It is generally … Continue reading How to convert weight percent to mole fraction »

How to Find Quantum Numbers for an atom

There are four Quantum Numbers for the each electron in the atom. In this post we will see how to find Quantum Numbers for the electrons in an atom or elements . In order to find the Quantum numbers, we need to consider two things. a. Quantum number range and meaning b.How the electrons are distributed in various order in the atom. Brief Introduction about … Continue reading How to Find Quantum Numbers for an atom »

Worksheet on Significant Figures

Significant Figures is an important concept to learn. We should know how to round off the numbers and find the significant figures or digits .Here is the Significant Figures worksheet to practice and master the concept of the significant figures Question 1 Find the significant figures in the below numbers a.  1065 b. .00008 c. 101.01 d. 11.000 e. 213.0005 f. 43.6752 g. 8.0076 h. 7001002 … Continue reading Worksheet on Significant Figures »

Important trigonometry questions for class 11 Maths

Here are some good Important trigonometry questions for class 11 Maths 1.if $tan \theta = \frac {a}{b}$ , show that $\frac {a sin \theta – b cos \theta}{a sin \theta + b cos \theta}= \frac {a^2 – b^2}{a^2 + b^2}$ 2.Prove that $sec^4 x – sec^x = tan^4x + tan^2 x$ 3.Prove that $cosec x ( sec x -1) – cot x(1- cos x) = tan … Continue reading Important trigonometry questions for class 11 Maths »

Trigonometric table from 0 to 360 (cos -sin-cot-tan-sec-cosec)

Trigonometric ratios are important module in Maths. Here in this post, I will provide Trigonometric table from 0 to 360 (cos -sin-cot-tan-sec-cosec) and also the easy and simple way to remember it. Trigonometric table for 0 to 90 is given by And this can be easily remember by below method How to easily remember trigonometric ratios table Now to remember the Trigonometric table for 120 to … Continue reading Trigonometric table from 0 to 360 (cos -sin-cot-tan-sec-cosec) »