Question

the measurement, 20600 molecules, has how many significant digits? a 1 b 2 c 3 d 4 e 5

Explanation:

Step1: Recall significant digit rules

Significant digits: Non - zero digits are significant. Zeros between non - zero digits are significant. Trailing zeros in a whole number without a decimal are not significant (they are just placeholders).

Step2: Analyze the number 20600

In the number 20600, the non - zero digits are 2 and 6, and the zero between them (the zero between 2 and 6) is also significant. The trailing zeros (the two zeros at the end) are not significant. So the significant digits are 2, 0 (between 2 and 6), and 6. That's a total of 3 significant digits.

Answer:

C. 3