Marcus measured the masses and volumes of samples of four different substances, and he calculated their densities. The table shows Marcus’s measured and calculated values.

Substance Mass (g) Volume (cm3) Density (g/cm3)
aluminum 5.7 2.1 2.7
copper 14.4 1.6 9.0
iron 9.5 1.2 7.9
titanium 8.6 1.8 4.8

Next, Marcus obtained another sample, which is made of one of the four substances that he had already measured. The table shows Marcus’s measured values for this unknown sample.

Substance Mass (g) Volume (cm3)
? 9.5 2.1

What is the unknown sample made of?

A.
aluminum
B.
copper
C.
iron
D.
titanium

Question

Marcus measured the masses and volumes of samples of four different substances, and he calculated their densities. The table shows Marcus’s measured and calculated values.

Substance Mass (g) Volume (cm3) Density (g/cm3)
aluminum 5.7 2.1 2.7
copper 14.4 1.6 9.0
iron 9.5 1.2 7.9
titanium 8.6 1.8 4.8

Next, Marcus obtained another sample, which is made of one of the four substances that he had already measured. The table shows Marcus’s measured values for this unknown sample.

Substance Mass (g) Volume (cm3)
? 9.5 2.1

What is the unknown sample made of?

A. 
aluminum
B. 
copper
C. 
iron
D. 
titanium

JustSaiyan · Answer

Density is equivalent to Mass divided by volume. Being that from what it says, the only value not known for the substance is its density. Divide the mass by the volume: you get 4.5. Then all you really have to do is find the substance that has the closest values to this, that being titanium, if I solved this right. :thonk: