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: magnesium, 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

To find the mass of the magnesium block with the same volume as the iron block, first calculate the volume of the iron block using its mass and density: Volume = Mass / Density = 826 g / 7.9 g/cm³ = 104.56 cm³. Then, calculate the mass of the magnesium block using this volume and the density of magnesium: Mass = Volume × Density = 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 $\circ$