A block of concrete has a density of 9 kg/m^3 and a volume of 210 000 cm^3 What is its mass

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

density = 9 kg/m³

1 cm³ = 0.000001 m³

210,000 cm³ = 0.21 m³

So we have

mass = 9 × 0.21

We have the final answer as

Hope this helps you

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).

the answer is d.) potassium