미해결 질문
Do each calculation without your calculator and give the answers to the correct number of significant figures: a. 1.76 * 10^3 > 8.0 * 10^2 b. 1.87 * 10^-2 + 2 * 10^-4 - 3.0 * 10^-3 c. [(1.36 * 10^5)(0.000322) > 0.082](129.2)
1. Intro to General Chemistry
Significant Figures: In Calculations
Multiple Choice
Calculate 12.45 × 0.036 and record your answer with the correct number of significant figures.
A
0.448
B
0.4
C
0.4482
D
0.45
검증된 단계별 안내1
Identify the number of significant figures in each number: 12.45 has 4 significant figures, and 0.036 has 2 significant figures.
Perform the multiplication: multiply 12.45 by 0.036 to get the raw product (do not round yet).
Determine the number of significant figures for the final answer: the result should have the same number of significant figures as the number with the fewest significant figures, which is 2 in this case.
Round the raw product to 2 significant figures to ensure the answer reflects the correct precision.
Write the final answer with the correct number of significant figures, which will be 0.45.
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