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Some Basic Concepts Of Chemistry

Question

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The atomic mass of metal M is 56. Calculate the empirical formula of its oxide containing 70% of M.

Solution

(i) To calculate the percentage of oxygen.

Percentage space of space metal space space equals space space 70 percent sign Percentage space of space oxygen space space equals space 100 space minus space 70 space equals space 30 percent sign

(ii) To calculate the empirical formula of oxide:

Some More Questions From Some Basic Concepts of Chemistry Chapter

What is the number of significant figures in 9.984?

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?

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