Perform the calculation and record the answer with the correct number of significant figures.

The question is incomplete, here is the complete question:

A. (6.5-6.10)/3.19

B. (34.123 + 9.60) / (98.7654 - 9.249)

For A: The answer becomes 0.1

For B: The answer becomes 0.4884

Explanation:

Significant figures are defined as the figures present in a number that expresses the magnitude of a quantity to a specific degree of accuracy.

Rules for the identification of significant figures:

Rule applied for addition and subtraction:

The least precise number present after the decimal point determines the number of significant figures in the answer.

Rule applied for multiplication and division:

In case of multiplication and division, the number of significant digits is taken from the value which has least precise significant digits

This a a problem of subtraction and division.

First, the subtraction is carried out.

Here, the least precise number after decimal was 1.

Here, the least precise number of significant digit is 1. So, the answer becomes 0.1

This a a problem of subtraction, addition and division.

First, the subtraction and addition is carried out.

Here, the least precise number after decimal in addition are 2 and in subtraction are 3

Here, the least precise number of significant digit are 4. So, the answer becomes 0.4884

yes

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answer; the numbers of valence electrons in the acetic acid molecule (ch3co2h) is 24;