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Some Basic Concepts Of Chemistry

Question

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How many significant figures should be present in the answer of the following calculations?
$0.0125 plus 0.7864 plus 0.0215$

Solution

Since the least number of decimal places in the given addition in the term is 4, therefore the answer should have 4 significant figures.

Some More Questions From Some Basic Concepts of Chemistry Chapter

Express the Avogadro's number (6·023×10²³) upto three significant figures.

What is the result of (5.472 - 1.12) to the appropriate number of signficant figures?

Express 0.0468 in scientific notation.

What does SI units stand for?

What is the relation between temperature in Kelvin (K) and temperature on centigrade scale?

The popular unit of pressure is atmosphere, how is it related to pascal?

What are SI units of the following:

(i) Density
(ii) Molarity
(iii) Energy
(iv) Temperature ?

Out of 5.00 g and 5.0 g which one is more accurate and why?

What is iodised table salt?

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