Textbook Question
Calculate to the correct number of significant figures. a. 0.004 + 0.09879 b. 1239.3 + 9.73 + 3.42 c. 2.4 - 1.777 d. 532 + 7.3 - 48.523
1. Intro to General Chemistry
Significant Figures: In Calculations
Multiple Choice
Solve the following, considering significant figures: 2.3 + 4.94 + 3 =
A
10.24
B
10.234
C
10.2
D
10.3
Verified step by step guidance1
Identify the numbers involved in the addition: 2.3, 4.94, and 3.
Determine the number of decimal places for each number: 2.3 has 1 decimal place, 4.94 has 2 decimal places, and 3 has 0 decimal places.
When adding numbers, the result should be rounded to the least number of decimal places present in the original numbers. In this case, the least number of decimal places is 0 (from the number 3).
Perform the addition: 2.3 + 4.94 + 3 = 10.24.
Round the result to the least number of decimal places (0 decimal places), which gives the final answer as 10.
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