Question

A 46.9 gram sample of substance has a volume of about 3.5 centimeters3. it is solid at room temperature of 23c out of the four substances whose properties are given, is the most likely of this substance? molybdenum, mercury, hafnium, or lead

Answer 1

Answer:

Answer:- C. Hafnium.

Solution:- Mass of the sample is 46.0 g and it's volume is 3.5cm^33.5cm

3

.

From mass and volume, we can calculate it's density using the formula:

density=\frac{mass}{volume}density=

volume

mass

density=\frac{46.9g}{3.5cm^3}density=

3.5cm

3

46.9g

density=\frac{13.4g}{cm^3}density=

cm

3

13.4g

On the basis of the density, this substance could either be mercury or hafnium. Since the substance is a solid at room temperature where as mercury is liquid. So, it can't be mercury.