Question

application questions

1. given that mass is dependent on the sample size, what does the fact that substance b has a greater mass than substance a most likely indicate?

a. substance b is made of an entirely different material
b. substance b has greater density and should be chosen for the casing
c. the sample of substance b is simply larger, and mass alone cannot identify material type
d. substance b is magnetic, while substance a is not

1. why would density be a more reliable property for identifying unknown substances than mass or volume in this situation?

a. density depends on both the volume and sample size
b. density stays constant regardless of the amount of material, making it useful for identification
c. density tells engineers how much heat a substance can hold
d. density is the only property that can detect magnetism

1. the team is considering whether to treat substances a and b as interchangeable materials. which piece of evidence from the data would most strongly suggest that they are in fact two different substances?

a. they have different masses
b. they have different densities, which is a size - independent property
c. they are both good conductors of heat and electricity
d. they are both non - magnetic

1. suppose the engineers mistakenly relied on sample mass to determine that substance b is superior. why would this lead to a potentially flawed conclusion?

a. because mass is affected by sample size and does not reflect the substances identity
b. because larger masses always indicate more conductive materials
c. because electrical conductivity cannot be measured in small samples
d. because lighter materials are never used in electronics manufacturing

Explanation:

1. Mass depends on sample - size. A greater mass could just mean a larger sample.
2. Density is a characteristic property that remains constant regardless of the amount of a substance.
3. Different densities (a size - independent property) strongly suggest different substances.
4. Mass is affected by sample size and doesn't reflect the substance's identity.

Answer:

1. c. The sample of Substance B is simply larger, and mass alone cannot identify material type
2. b. Density stays constant regardless of the amount of material, making it useful for identification
3. b. They have different densities, which is a size - independent property
4. a. Because mass is affected by sample size and does not reflect the substance's identity