How is it possible for a compound to both have ionic and covalent bonds

Much of the general structure and physical properties of the interior of the earth are inferred from: a)deep oil and gas bore holes b)geologic investigations c)analysis of seismic waves d) study of volcanoes

An observation that requires measurement is called quantitative observable or qualitative

What is the mass of 2.00 l of an intravenous glucose solution with a density of 1.15 g/ml?