Measurement in Chemistry

The boiling point of chlorine is ‑34.6 °C. This temperature

expressed in kelvins is

• -30.3K

• 177.4K

• 238.6K

• 243.0K

The momentum of an object is its mass times its velocity. What is the derived SI unit for momentum?

• kg/m

• kg m/s

• g m/s

• m/s²

Which is the longest measurement?

• 10 mm

• 10 dm

• 10 cm

• 10 micrometer

How many significant figures should be displayed in the result of the operation, 8.5201 + 1.93?

• 1

• 2

• 3

• 4

The diameter of a certain atom was found to be 2.35 x 10^‑8 cm. How many nanometers is this?

• 2.35 x 10¹ nm

• 2.35 x 10^‑19 nm

• 2.35 x 10^‑1 nm

• 2.35 x 10^‑10 nm

How many cm³ are in 0.00424 dm³?

• 4.24 cm³

• 0.424 cm³

• 424 cm³

• 0.0424 cm³

The density of gold, expressed in non-SI units is 19.3 g/cm³. In SI units, the density is

• 0.0193 kg/cm³

• 1.93 x 10⁴ kg/m³

• 1.93 x 10⁴ kg/cm³

• 193 kg/m³

An empty volumetric flask, weighing 27.16 grams, has a volume of 100.4 cm³. How much would it weigh when filled with bromine, an element that has a density of 3.1028 g/cm³?

• 395.8 g

• 284.4 g

• 338.7 g

• 311.5 g

Convert 2.5 kg/m³ into g/m³

• 0.25

• 0.25

• 0.0025

• 0.00025

Convert 39.45 g/mL into kg/L

• 0.03945

• 0.3945

• 3.945

• 39.45