the scientist repeats the experiment, burning a new sample of steel wool until it is entirely converted into iron oxide. the iron oxide produced has a mass of 715g. what was the mass of the sample before burning

What overall charge must all compounds have

Which of the following statements about hybrid orbitals is or are true? choose all that apply. choose all that apply. under sp2 hybridization, the large lobes point to the vertices of an equilateral triangle. after an atom undergoes sp hybridization there is one unhybridized p orbital on the atom. the angle between the large lobes of sp3 hybrids is 109.5∘

The molality of calcium chloride (cacl2) in an aqueous solution is 2.46 m. what is mole fraction of the solute?