Question

How many significant figures should be written in the sum 4.56 g + 9.032 g + 580.0078 g + 540.439 g?
a.3
b.4
c.5
d.6
e.7?

Answer 1

The answer is 6
When you add all the numbers up
You will find out that the sum is 6 significant

Answer 2

The number of significant figures in 1,134.04' is 6.

Explanation:

• When the two decimal numbers with different significant figures are added or subtracted the final answer is reported in the least number of decimal places.
• When the two decimal numbers with different significant figures are multiplied or divided the final answer is reported in the least number of significant figures.

Given:

4.56 g + 9.032 g + 580.0078 g + 540.439 g

To find:

Number of significant figures in the sum of the given expression

Solution:

$4.56 g + 9.032 g + 580.0078 g + 540.439 g\\=1,134.0388 g$

The number with the least decimal places is'4.56' that is with 2 decimal places, so the answer will be written up to 2 decimal places.

Rounding off the '1,134.0388 ' to up to 2 decimal places.

$=1,134.0388 g\apprpx =1,134.04 g$

The number of significant figures in 1,134.04' is 6.

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