Question

this graduated cylinder is marked with 1 ml increments. what is the volume measurement of the liquid, with the correct number of significant figures?
20 ml
25 ml
20.00 ml
26.0 ml

Explanation:

Step1: Analyze the graduated cylinder

The graduated cylinder has 1 mL increments. The meniscus (liquid level) is at 25 mL? Wait, no, looking at the marks: between 20 and 30, the liquid level is at 25? Wait, no, the scale: 10,20,30,40. The liquid is at 25? Wait, no, the options: 25 mL. Wait, let's check the increments. Each major mark (10,20,30,40) has 1 mL increments? Wait, the cylinder is marked with 1 mL increments. So between 20 and 30, there are 10 mL, with 1 mL each. Wait, the liquid level: let's see the image. The blue liquid is at 25? Wait, no, the options: 25 mL. Wait, the significant figures: when measuring with a graduated cylinder with 1 mL increments, we can estimate one decimal place? Wait, no, 1 mL increments mean the uncertainty is ±0.5 mL? Wait, no, the options: 25 mL. Wait, let's check the options. The correct reading: the meniscus is at 25 mL? Wait, the options are 20,25,20.00,26.0. Wait, 25 mL: because between 20 and 30, the liquid is at the midpoint? Wait, 20 to 30 is 10 mL, so 25 mL. And with 1 mL increments, the measurement is 25 mL (two significant figures? Wait, 25 has two significant figures. Wait, but let's check the options. 25 mL is an option.

Step2: Determine significant figures

The graduated cylinder has 1 mL increments, so we can measure to the nearest mL, but when the meniscus is at a midpoint? Wait, no, the image: the liquid is at 25? Wait, the marks are 10,20,30,40. The liquid is at 25? So the volume is 25 mL. The significant figures: 25 has two significant figures, which is correct for a 1 mL increment cylinder (we can estimate to the nearest mL, but if it's at the midpoint, 25 is correct).

Answer:

25 mL