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01 Chemical Foundations and Measurement Online Quiz Questions

Use this free practice quiz with 20 questions to review 01 Chemical Foundations and Measurement, test your knowledge, and prepare for your next test or exam.

20 questions
01
Choose one
1 point

A lab records a volume of 25 milliliters. Which entry uses the correct unit symbol, spacing, and capitalization?

  1. A

    25ml

  2. B

    25 mLs

  3. C

    25mL

  4. D

    25 mL

02
Choose one
1 point

An invisible gas in a sealed syringe has measurable mass and occupies space inside the syringe. Which conclusion follows from the definition of matter?

  1. A

    It is matter because it is enclosed, whether or not it has mass.

  2. B

    It is matter because it has mass and occupies space.

  3. C

    It is not matter because it is invisible.

  4. D

    It is not matter because it has no fixed shape.

03
Choose one
1 point

A liquid sample is uniform throughout, but separate preparations can contain different proportions of its two components. How should the sample be classified?

  1. A

    A pure element, because the sample appears uniform.

  2. B

    A compound, because its components are mixed together.

  3. C

    A homogeneous mixture, because it is uniform but can have variable component proportions.

  4. D

    A heterogeneous mixture, because its component proportions can vary.

04
Choose one
1 point

A material consists of two different elements chemically combined in a fixed proportion. Which classification best fits the material?

  1. A

    A pure substance that is a compound

  2. B

    A pure substance that is an element

  3. C

    A homogeneous mixture

  4. D

    A heterogeneous mixture

05
Choose one
1 point

Which option correctly classifies both a substance's density and its flammability?

  1. A

    Density is physical; flammability is chemical.

  2. B

    Density is chemical; flammability is physical.

  3. C

    Both density and flammability are physical.

  4. D

    Both density and flammability are chemical.

06
Choose one
1 point

Which classification correctly describes the changes in this sequence: ice melts to liquid water, and wood burns to form new substances?

  1. A

    Melting ice is chemical; burning wood is physical.

  2. B

    Melting ice is physical; burning wood is chemical.

  3. C

    Both melting ice and burning wood are physical.

  4. D

    Both melting ice and burning wood are chemical.

07
Choose one
1 point

A uniform sample is divided into smaller portions. Which description correctly predicts what happens to the density, mass, and volume of each portion?

  1. A

    Density, mass, and volume all decrease.

  2. B

    Density decreases, while mass and volume remain unchanged.

  3. C

    Density remains unchanged, while mass and volume decrease.

  4. D

    Density and volume remain unchanged, while mass decreases.

08
Choose one
1 point

Two graduated scales have smallest marked intervals of 0.2 mL and 0.5 g. If each reading includes one estimated digit beyond the marked divisions, to which decimal places should the volume and mass be reported?

  1. A

    0.1 mL and 1 g

  2. B

    0.01 mL and 0.1 g

  3. C

    0.001 mL and 0.01 g

  4. D

    0.2 mL and 0.5 g

09
Choose one
1 point

A sample contains only water molecules, with hydrogen and oxygen chemically combined in a fixed proportion. Which classification best describes the sample?

  1. A

    It is an element because it contains only one kind of compound.

  2. B

    It is a compound and a pure substance because it has a definite composition.

  3. C

    It is a homogeneous mixture because its composition is uniform.

  4. D

    It is a heterogeneous mixture because its elements remain physically combined.

10
Choose one
1 point

A measurement is recorded as 0.004050 g0.004050\ \mathrm{g}. Which scientific-notation form preserves both its value and its indicated precision?

  1. A

    4.05×10−3 g4.05 \times 10^{-3}\ \mathrm{g}

  2. B

    4.050×10−2 g4.050 \times 10^{-2}\ \mathrm{g}

  3. C

    4.050×10−3 g4.050 \times 10^{-3}\ \mathrm{g}

  4. D

    4.0500×10−3 g4.0500 \times 10^{-3}\ \mathrm{g}

11
Choose one
1 point

A temperature is measured as 18.6 ∘C18.6\ ^\circ\mathrm{C}. Convert it to kelvin and report the result using the appropriate decimal-place precision.

  1. A

    291.75 K291.75\ \mathrm{K}

  2. B

    291.7 K291.7\ \mathrm{K}

  3. C

    291.8 K291.8\ \mathrm{K}

  4. D

    18.6 K18.6\ \mathrm{K}

12
Choose one
1 point

Convert 0.0320 km0.0320\ \mathrm{km} to millimeters. Treat the unit conversion relationships as exact and report the result with the correct number of significant figures.

  1. A

    3.20×104 mm3.20 \times 10^4\ \mathrm{mm}

  2. B

    3.2×104 mm3.2 \times 10^4\ \mathrm{mm}

  3. C

    3.20×103 mm3.20 \times 10^3\ \mathrm{mm}

  4. D

    3.200×104 mm3.200 \times 10^4\ \mathrm{mm}

13
Choose one
1 point

Which option correctly classifies both an observable property and a process that may occur to a substance?

  1. A

    A substance’s flammability is a physical property, and crushing it is a chemical change.

  2. B

    A substance’s electrical conductivity is a physical property, and its reaction with oxygen is a chemical change.

  3. C

    A substance’s color is a chemical property, and melting it is a chemical change.

  4. D

    A substance’s melting point is a chemical property, and burning it is a physical change.

14
Choose one
1 point

A uniform sample is divided into several smaller portions without changing its temperature or composition. Which set of changes should be expected for each portion compared with the original sample?

  1. A

    Each portion has less density, less mass, and less volume.

  2. B

    Each portion has the same density and the same mass, but less volume.

  3. C

    Each portion has the same density, but less mass and less volume.

  4. D

    Each portion has less density but the same mass and volume.

15
Choose one
1 point

An object is moved from Earth to a location on the Moon where gravity is weaker. Which statement correctly distinguishes what happens to its mass and weight?

  1. A

    Its mass decreases, while its weight remains the same because the amount of matter is unchanged.

  2. B

    Its mass remains the same, while its weight decreases because the gravitational force is weaker.

  3. C

    Both its mass and its weight decrease because the object occupies less space.

  4. D

    Both its mass and its weight remain the same because neither depends on gravity.

16
Choose one
1 point

Evaluate (6.24×1.5)/2.0(6.24 \times 1.5) / 2.0 and report the result with the correct number of significant figures.

  1. A

    4.684.68

  2. B

    4.74.7

  3. C

    4.704.70

  4. D

    55

17
Choose one
1 point

Calculate 18.64−3.2+0.01518.64 - 3.2 + 0.015 and report the result to the precision supported by the inputs.

  1. A

    15.45515.455

  2. B

    15.4615.46

  3. C

    15.515.5

  4. D

    16.016.0

18
Choose one
1 point

A structure is made from exactly 4 identical segments, each with a measured length of 2.46 m2.46\,\mathrm{m}. What total length should be reported with appropriate significant figures?

  1. A

    9.8 m9.8\,\mathrm{m}

  2. B

    9.84 m9.84\,\mathrm{m}

  3. C

    9.840 m9.840\,\mathrm{m}

  4. D

    10 m10\,\mathrm{m}

19
Choose one
1 point

Let xx and x0x_0 have units of meters, vv have units of meters per second, and tt have units of seconds. Which proposed equation is dimensionally consistent?

  1. A

    x=x0+vtx = x_0 + vt

  2. B

    x=x0+v/tx = x_0 + v/t

  3. C

    x=x0t+vx = x_0t + v

  4. D

    x=x0+vx = x_0 + v

20
Choose one
1 point

Convert 2.40 min2.40\,\mathrm{min} to seconds and select the value reported with appropriate significant figures. Use the exact relationship 60 s=1 min60\,\mathrm{s} = 1\,\mathrm{min}.

  1. A

    144 s144\,\mathrm{s}

  2. B

    144.0 s144.0\,\mathrm{s}

  3. C

    140 s140\,\mathrm{s}

  4. D

    2.40 s2.40\,\mathrm{s}