A block of iron has a mass of 826 g. What is the mass of a block of magnesium that has the same volume as the block of iron The following densities at 25^$\circ$C are provided: agnesium, 1.7 g/cm³ ; graphite, 1.8 g/cm³ ; iron, 7.9 g/cm³. A) 1,400 g B) 3,800 g C) 830 g D) 180 g E) none of them are within 10 g of the right answer.

Question

Quizplus · Accepted Answer

The volume of the iron block is 826 g / 7.9 g/cm³ = 104.56 cm³. The mass of magnesium with the same volume is 104.56 cm³ * 1.7 g/cm³ = 177.75 g, which is approximately 180 g.

A Block of Iron Has a Mass of 826 G ∘\circ∘

A Block of Iron Has a Mass of 826 G $\circ$