Question

question 7
perform the following calculation and give the answer with the correct number of decimal places.
3.53 g + 102.3 g + 43.712 g
answer
149.5 g
149.54 g
149.6 g
149.542 g
149 g
i dont know yet

Explanation:

Step1: Add the masses

$3.53 + 102.3+43.712=149.542$

Step2: Determine significant - figures for addition

When adding, the result should be rounded to the same number of decimal places as the number with the fewest decimal places among the values being added. 102.3 has one decimal place, so we round 149.542 to one decimal place.
$149.542\approx149.5$

Answer:

149.5 g