A sample of molten iron occupies a volume of 7.11 × 10^{− 3} L. If the density of iron is 7.86 g/cm³, what is the mass of iron in grams in the sample? A) 0.000904 g B) 0.0559 g C) 0.904 g D) 1.105 g E) 55.8846 g

Question

Quizplus · Accepted Answer

First, we need to use the density formula:

density = mass/volume

Rearranging this formula, we get:

mass = density x volume

Substituting the given values, we get:

mass = (7.86 g/cm3) x (7.11 × 10-3 L)

Converting liters to cubic centimeters (cm3), we get:

mass = (7.86 g/cm3) x (7.11 × 103 cm3)

Simplifying, we get:

mass = 55.8846 g

Therefore, the mass of iron in the sample is 55.8846 g. The best choice is E.

A Sample of Molten Iron Occupies a Volume of 7