Refer to picture attached for solution
In this question we are asked to round off the figure 0.02056 to three significant figures.
We are given with four options to chose best out of four
a) 0.0205
b) 0.0206
c) 0.021
d) 0.020
In this question, option (b) is correct i.e. 0.0206.
There are four significant rules, we should keep in mind during round off:
- Non-zero digits are so significant
- Zeros between two non-zero digits are significant
- Leading zeros are not significant
- Trailing zeros are important only if the number contains a decimal point
To know more about Round off:
brainly.com/question/24234983
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The number of electrons in the outermost shell of an atom determines<span> its </span>reactivity<span>.</span><span>
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I belive its b
hope this helps :)
Because chemical energy is stored the chemical reaction takes place the stored chemical energy is released.
