The mass of a solid substance is 21.1164 g. If the volume of
the solid substance is 19.9 cm", calculate the density of the
substance with the correct number of significant digits.

Aballoon inflated with three breaths of air has a volume of 1.7 l. at the same temperature and pressure, what is the volume of the balloon if five more same-sized breaths are added to the balloon? a balloon inflated with three breaths of air has a volume of 1.7 l. at the same temperature and pressure, what is the volume of the balloon if five more same-sized breaths are added to the balloon?

Iron (3) oxide will decompose in the presence of hydrogen gas and heater to produced iron and digydrogen monoxide white a balanced chemical equation

Explain in detail of the four major scientific developments that spurred the formulation of the plate tectonics theory