Question

postlaboratory assignment

1. state the basic unit in the metric system for each of the following.

(a) length ____ (b) mass ____
(c) volume ____ (d) temperature ____

1. state a common laboratory instrument for measuring each of the following.

(a) diameter of a beaker ____ (b) mass of a sample ____
(c) volume of water ____ (d) temperature of air ____

1. state the metric unit associated with each of the following instruments.

(a) metric ruler ____ (b) balance ____
(c) graduated cylinder ____ (d) thermometer ____

1. select the measurement that is consistent with the uncertainty of each instrument.

(a) metric ruler a: 5 cm, 5.0 cm, 5.00 cm ______
(b) metric ruler b: 5 cm, 5.0 cm, 5.00 cm ______
(c) decigram balance: 5.0 g, 5.00 g, 5.000 g ______
(d) centigram balance: 5.0 g, 5.00 g, 5.000 g ______
(e) milligram balance: 5.0 g, 5.00 g, 5.000 g ______
(f) graduated cylinder: 5 ml, 5.0 ml, 5.00 ml ______
(g) celsius thermometer: 5 °c, 5.0 °c, 5.00 °c ______

1. state the uncertainty (for example, ± 0.5 cm) in each of the following measurements.

(a) 25.00 cm ____ (b) 25.000 g ____
(c) 25.0 ml ____ (d) 25.0 °c ____

Explanation:

Answer:

1. (a) meter (m)

(b) gram (g)
(c) cubic meter (m³) or liter (L)
(d) degree Celsius (°C) or kelvin (K)

1. (a) metric ruler (or caliper)

(b) balance (e.g., electronic balance, triple - beam balance)
(c) graduated cylinder (or volumetric flask, pipette)
(d) thermometer (e.g., alcohol thermometer, digital thermometer)

1. (a) meter (m) (or centimeter (cm))

(b) gram (g)
(c) milliliter (mL) (or liter (L))
(d) degree Celsius (°C) (or kelvin (K))

1. (a) 5.0 cm

(b) 5.00 cm
(c) 5.0 g
(d) 5.00 g
(e) 5.000 g
(f) 5.0 mL
(g) 5.0 °C

1. (a) ±0.01 cm

(b) ±0.001 g
(c) ±0.1 mL
(d) ±0.1 °C