If one methane hydrocarbon molecule, CHg, contains one carbon atom and four hydrogen atoms: (a) how many carbon atoms and (b) how many hydrogen atoms are found in one dozen methane molecules? ​

Express the following number in scientific notation. 0.026890 =

What happens when an atom of sulfur combines with two atoms of chlorine to produce sci2? a. each chlorine atom shares a pair of electrons with the sulfur atom. b. an electron is transferred from each chlorine atom to the sulfur atom. c. an electron is transferred from the sulfur atom to each chlorine atom. d. each chlorine atom shares all its valence electrons with the sulfur atom.

Asample of sea water contains 6.28g of sodium chloride per litre of solution. how many milligrams of sodium chloride would be contained in 15.0ml of this solution?