What happens when sodium undergoes a chemical reaction with chlorine? A The two substances form a heterogeneous mixture B. The two substances form a homogenous mixture C A new compound is formed – salt D The two substances undergo various physical changes

Which statement describes covalent bases? they have hydroxide ions. they produce hydrogen ions. they are often amines. they are named the same as ionic compounds.

In numbering carbon atoms in the parent chain of a hydrocarbon, why would you number from right to left, rather than left to right

There are 6.022, 104 atoms of hg in 1 mole of hg the number of atoms in 45 moles of hg can be found by multiplying 4.5 by 6.022, 102 which is the number of atoms in 4.5 moles of hg, correctly written in scientific notation with the correct number of significant figures? 0 21,109 0 21,100 271, 1024 27.099, 100 mark this and retum save and exit submit