Qiping Dong

Rated 4.33(6) — Qiping Dong

It determines whether an input number is a prime number and gives its prime factors if it is not a prime number;It generate prime numbers between 2 numbers; It generate max prime numbers;It generate twin prime numbers, cousin prime numbers, sexy prime...

Rated 4.00(3) — Qiping Dong

This calculator is designed for computing the molecular weight (MW) of molecules by entering the chemical formulas (for example (CH2O)6).

Rated 5.00(1) — Qiping Dong

The Math 24 Game and a powerful solver. The game is really challenging.You can choose easy, medium hard mode. The hard mode is really hard to solve. You will enjoy it!Ads free.The solver include factorials and power operation. Just try it!

Rated 3.00(2) — Qiping Dong

Make solution, calculate concentration, and gives the require volume.Molecular weight calculator, to calculate the MW of any given compound.Commonly used chemical compounds list;Share your list.It gives the required weight, concentration, or volume based.