Question 1 Calculate the Molarity of the below solutions a.100 g NaCl dissolved in 1500 cm3 solution b..2 Moles of AgNO3 in 2 L of solution c.16 gm of CH3OH in 400 cm3 of solution Molar Mass of NaCL = 58.5 g/Moles Molar Mass of CH3 OH = 32 g/Moles Answer a.14 M b..1 M c. 25 M   Question 2 Find the volume of … Continue reading Molarity Practice Worksheet »

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 »

Here is the chart of allowed Quantum numbers We can  easily see the below combinations are not possible for Quantum numbers Related Articles Quantum number worksheet How to Find Quantum Numbers for an atom Quantum Mechanical Model

Quantum number is important concept for understanding structure of atom. Here is worksheet on Quantum number to excel in examination Question 1. What is the total number of orbitals associated with the principal quantum number n = 3 ? Question 2. Using s, p, d, f notations, describe the orbital with the following quantum numbers (a) n = 2, l = 1 (b) n = … Continue reading Quantum number worksheet »

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 »

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 »

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 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) »