Samples with masses of 5.5 g 2.27 g and 0.8995 g are mixed together. The sum of the masses of the three
samples, expressed to the correct number of significant figures should be recorded as

In this case, it is widely known that when measurements with different significant figures are put under mathematical operations, the final result must be displayed with the same amount of significant figures of the shortest measurement, thus, due to the fact that 5.5 g has two significant figures only the result is consequently shown with two significant figures as well as shown down below:

[tex]m=5.5g+2.27g+0.8995g\\\\m=8.6695g[/tex]

By rounding the first six to seven due to the fact that the next six is greater than five, according to rounding rules, the result is:

[tex]m=8.7g[/tex]

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Samples with masses of 5.5 g 2.27 g and 0.8995 g are mixed together. The sum of the masses of the three samples, expressed to the correct number of significant figures should be recorded as

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Samples with masses of 5.5 g 2.27 g and 0.8995 g are mixed together. The sum of the masses of the three
samples, expressed to the correct number of significant figures should be recorded as