Question

Which volume measurement is expressed in four significant figures?

a) 25 mL
b) 250 mL
c) 2.50 mL
d) 0.250 mL

Answer 1

The volume measurement expressed in four significant figures is 0.250 mL . The correct answer is option D.

Step-by-step explanation:

The volume measurement expressed in four significant figures is 0.250 mL (option d).

To determine the number of significant figures in a measurement, you should consider the following rules:

1. 
   
2. All non-zero digits are significant. In this case, the numbers 2 and 5 are non-zero digits.
3. 
   
4. Zeroes between non-zero digits are significant. In this case, there are no zeroes between non-zero digits.
5. 
   
6. Leading zeroes (zeros before the first non-zero digit) are not significant. In this case, all options start with non-zero digits, so there are no leading zeroes.
7. 
   
8. Trailing zeroes (zeros after the last non-zero digit) are significant if there is a decimal point. In this case, options a, b, and d have trailing zeroes after the decimal point.

Based on these rules, option a (25 mL) has two significant figures, option b (250 mL) has three significant figures, option c (2.50 mL) has three significant figures, and option d (0.250 mL) has four significant figures.

Therefore, option d is the volume measurement expressed in four significant figures.