Question

12) In chemistry, one mole is defined as the
amount of substance having
602,250,000,000,000,000,000,000
molecules. This number is called
Avogadro's number. Write it in scientific
notation. (Approximate the significant
digits as 6.023) with explanation​

Answer 1

Answer:

As we know that numbers that are too large or small are written in decimal form to make it simple and easy. The way of expressing a large and small number in decimal form is called scientific notation.

As we know that the number 602,250,000,000,000,000,000,000 is too large to write therefore the most convenient way is to write in decimal form.

Step 1- To make it short start from the right side. As it is understood that this number has a decimal at its extreme right side. Pick the decimal and place it to the very left digit i.e 6 such as 6.  

Step 2- In scientific notation, it will be written as 6.023 x 10^ 23. It means that the number 6.023 is followed by 23 zeros.

Answer 2

Step-by-step explanation:

★ Avogadro Number ★

→ one mole is the collection of 6.02 × 10^(23) entities . It is given as separate name & symbol known as Avogadro constant denoted by NA . Entities may represent atoms , ions , molecules or even pens , chair, paper etc also include in this but as this number (NA) is very large therefore it is used only for very small things.