Units and Measurements — Practice Quiz

A Chemistry cheat sheet for Units and Measurements — every key formula with its symbols defined — plus a medium-level practice quiz to test recall.

Formulas & key concepts

Temperature conversion: Celsius to Kelvin

$$K = ^\circ C + 273.15$$

Temperature conversion: Fahrenheit to Celsius

$$^\circ C = \frac{5}{9}(^\circ F - 32)$$

Temperature conversion: Celsius to Fahrenheit

$$^\circ F = \frac{9}{5}(^\circ C) + 32$$

Density = mass / volume

$$d = \frac{m}{V}$$
QuantityUnitSymbol
Lengthmeterm
Masskilogramkg
Timeseconds
TemperatureKelvinK
Amountmolemol
CurrentAmpereA
Luminous int.candelacd
$$\text{SI Base Units}$$
PrefixSymbolFactor
PetaP1015
TeraT1012
GigaG109
MegaM106
Kilok103
Decid10-1
Centic10-2
Millim10-3
Microμ10-6
Nanon10-9
Picop10-12
Femtof10-15
$$\text{SI Prefixes}$$

Practice quiz

  1. Convert $25^\circ C$ to Kelvin.

    • $298.15 \text{ K}$
    • $248.15 \text{ K}$
    • $273.15 \text{ K}$
    • $25 \text{ K}$

    Answer: $298.15 \text{ K}$

  2. A substance has a temperature of $350 \text{ K}$. What is its temperature in degrees Celsius?

    • $76.85^\circ C$
    • $350^\circ C$
    • $623.15^\circ C$
    • $273.15^\circ C$

    Answer: $76.85^\circ C$

  3. The normal human body temperature is $98.6^\circ F$. What is this temperature in degrees Celsius?

    • $37^\circ C$
    • $32^\circ C$
    • $22.8^\circ C$
    • $66.6^\circ C$

    Answer: $37^\circ C$

  4. If a chemical reaction occurs at $100^\circ C$, what is this temperature in degrees Fahrenheit?

    • $212^\circ F$
    • $180^\circ F$
    • $32^\circ F$
    • $100^\circ F$

    Answer: $212^\circ F$

  5. A block of wood has a mass of $120 \text{ g}$ and a volume of $150 \text{ cm}^3$. What is its density?

    • $0.8 \text{ g/cm}^3$
    • $1.25 \text{ g/cm}^3$
    • $270 \text{ g/cm}^3$
    • $30 \text{ g/cm}^3$

    Answer: $0.8 \text{ g/cm}^3$

  6. An object has a density of $2.5 \text{ g/cm}^3$. If its volume is $40 \text{ cm}^3$, what is its mass?

    • $100 \text{ g}$
    • $16 \text{ g}$
    • $42.5 \text{ g}$
    • $37.5 \text{ g}$

    Answer: $100 \text{ g}$

  7. Which of the following is the SI base unit for mass?

    • gram
    • pound
    • kilogram
    • ounce

    Answer: kilogram

  8. What is the SI symbol for the base unit of time?

    • $t$
    • $s$
    • $sec$
    • $min$

    Answer: $s$

  9. How many meters are in $5 \text{ Megameters}$?

    • $5 \times 10^3 \text{ m}$
    • $5 \times 10^6 \text{ m}$
    • $5 \times 10^9 \text{ m}$
    • $5 \times 10^{-6} \text{ m}$

    Answer: $5 \times 10^6 \text{ m}$

  10. Convert $0.025 \text{ liters}$ to milliliters.

    • $2.5 \text{ mL}$
    • $25 \text{ mL}$
    • $0.25 \text{ mL}$
    • $250 \text{ mL}$

    Answer: $25 \text{ mL}$

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