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Elza [17]
2 years ago
5

Express the following answers with the correct number of significant figures. 3.582 ÷ 0.0131

Chemistry
1 answer:
kkurt [141]2 years ago
7 0
Answer is 273

explanation:

The rule of division for significant figures is to put the answer to the least amount of significant figures presented in the problem.
0.0131 only has 3 sig figs which is 131
3.582 has 4 sig figs
The least amount is 3 in the problem
When you originally divide 3.582 and 0.0131 you get 273.4531 in your calculator

Now put it to 3 sig figs
4 is not greater than 5 so you don't need to round
273 is 3 sig figs.
So answer is 273
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Yes, electrons with energy of 1.3ev will be emitted from the metal surface

Explanation:

From Eisenstein's photoelectric equation;

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