Idk if it's correct but I guess it's calcite (c)
Answer:
The cost is $0.063.
Explanation:
First, we need to express the volume of the hangar in liters. We know that 1 ft³ = 28.31 L, so using proportions:

The amount of vanillin required would be:

Finally, the price for such amount of vanillin is:

Answer:
Alkali metals are soft and have low melting points.