Question

1 multiple choice 2 points
what is the answer, with the correct number of decimal places, for this problem?
$4.392\\ \text{g} + 102.40\\ \text{g} + 2.51\\ \text{g} =$
$109.302\\ \text{g}$
$109\\ \text{g}$
$110\\ \text{g}$
$109.30\\ \text{g}$
$109.3\\ \text{g}$
2 multiple choice 2 points
how many significant figures are in $0.00186600\\ \text{ml}$?
3
4
5
6
7

Explanation:

Step1: Sum the given values

$4.392\ \text{g} + 102.40\ \text{g} + 2.51\ \text{g} = 109.302\ \text{g}$

Step2: Round to least decimal places

The value with the fewest decimal places is 2.51 g (2 decimal places). Round 109.302 to 2 decimal places: $109.30\ \text{g}$

Leading zeros (0.00...) are not significant. Non-zero digits and trailing zeros after a decimal that follow non-zero digits are significant. In 0.00186600, the significant digits are 1,8,6,6,0,0, totaling 6.

Answer:

109.30 g

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