How many single bonds does an atom of carbon normally make in a covalent molecule if there are no double or triple bonds

Why are pipes bursting in the in extremely cold weather?

Which best describes the present-day universe? opaque, expanding very slowly, stars produce heavy elements transparent, expanding at an accelerated rate, stars produce heavy elements opaque, expanding at an accelerated rate, stars produce only hydrogen and helium transparent, expanding very slowly, stars produce only hydrogen and helium

Which of the following is described by the equation h2o(s)+ heat=h2o(i) a freezing melting condensing evaporating