An unknown compound has the following chemical formula: nox where x stands for a whole number. measurements also show that a certain sample of the unknown compound contains 7.5 mol of oxygen and 7.5 mol of nitrogen. write the complete chemical formula for the unknown compound.

Working with si (metric) units for each of the following commonly used measurements, indicate its symbol. liter gram milliliter kilogram meter centigram milligram centimeter kilometer second millimeter milliseconds

Can someone me with questions 15 to 17 plz.

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∘