Question:
Convert the following into basic units:- 28.7 pm
- 15.15 pm
- 25365 mg
Convert the following into basic units:
- 28.7 pm
- 15.15 pm
- 25365 mg
Updated On: Sep 22, 2024
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Solution and Explanation
(i) 28.7 pm:
1 pm = 10-12 m
∴ 28.7 pm = 28.7 × 10-12 m
= 2.87 × 10-11 m
(ii) 15.15 pm:
1 pm = 10-12 m
∴ 15.15 pm = 15.15 × 10-12 m
= 1.515 × 10-11 m
(iii) 25365 mg:
1 mg = 10-3 g
25365 mg = 2.5365 × 104 × 10-3 g
Since,
1 g = 10-3 kg
2.5365 × 101 g = 2.5365 × 101 × 10-3 kg
∴ 25365 mg = 2.5365 × 10-2 kg
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Chemistry is a vast subject and for understanding its significance we can take help of following points:
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Classification of Matter
There are two ways of classifying the matter:
(A) Physical Classification:
Matter can exist in three physical states:
- Solids - have definite volume and definite shape
- Liquids - have definite volume but not definite shape.
- Gases - have neither definite volume nor definite shape.
(B) Chemical Classification:
Based upon the composition, matter can be divided into two main types:
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