Balance the following chemical equation. 2 BF3 + 3 Li2SO3 = ? B2 (SO3)3 + 6 LiF
What number replaces the question mark?

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

Which of the following statements about acidic water is true? a. acid has no effect on the h, o molecules. b. the solution contains a larger number of oh ions than h, o ions. c. the solution contains a larger number of h, o ions than qh ions. d. the solution contains an equal number of h, o ions and oh ions. none of the above e.

Stage in which a typical star has completely stopped fusion