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?

Answer 1

the answer is D) Titanium. you divide the mass by volume and titanium has the closest density yo the number you get. I also chose titanium and got it right. goodluck

Answer 2

Answer:

The unknown substance is made up titanium.

Explanation:

Density is defined as mass present in the unit volume of the substance.It is an intensive property.

Density of Aluminium = $2.7 g/cm^3$

Density of copper = $9.0 g/cm^3$

Density of iron = $7.9 g/cm^3$

Density of titanium = $4.8 g/cm^3$

Density of the unknown substance:

$\frac{mass}{Volume}=\frac{9.5 g}{2.1 cm^3}=4.5 g/cm^3$

The density of the unknown substance is close to the density of the titanium. This means that unknown substance is made of titanium.