Question

A rock is composed of 30% quartz (density = 2.65 g/cm3), 25% pyroxene (density = 3.50 g/cm3), 35% feldspar (density = 2.70 g/cm3), and 10% horneblende (density = 3.28 g/cm3). What is the bulk density of the rock? (only keep 2 decimal places in your answer)

Answer 1

2.94 g/cm3

Step-by-step explanation:

To find the bulk density of the rock, we need to consider the weighted average of the densities of each mineral component, taking into account their respective proportions:

Bulk density = (0.3 x 2.65 g/cm3) + (0.25 x 3.50 g/cm3) + (0.35 x 2.70 g/cm3) + (0.1 x 3.28 g/cm3)

Bulk density = 0.795 + 0.875 + 0.945 + 0.328

Bulk density = 2.943 g/cm3

Therefore, the bulk density of the rock is 2.94 g/cm3 (rounded to two decimal places).