2H2O +O2 → 2H2O2 What mass of oxygen gas is necessary to react completely with 45 g of water?

Covalent network solids typically have melting points and boiling points. the chemical formula of a network solid indicates in the molecule.

Which describes fat? a: a carbohydrate that produces energy b: a nucleic acid that directs cell function c: a lipid that stores energy d: a protein that speeds up a chemical reaction

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.