1. The problem statement, all variables and given/known data I just wanted to know if I wrote the answer with the correct number of significant figures for this addition problem. 0.00015 M + 0.00004 M + 0.00011 M = 0.00030 M (Correct?) 2. Relevant equations See above. 0.00015 M + 0.00004 M + 0.00011 M = ? 3. The attempt at a solution See Part 1. All of the original numbers have 5 decimals places, but only the first and third values have 2 significant figures. (The second has 1 significant figure.) Therefore, the final answer must be expressed with 5 decimal places, and will have 2 significant figures (0.00030 M)? Thank you.