Answer:
bond angles of 120 degrees.
1) START counting for sig. figs. On the FIRST non-zero digit.
2) STOP counting for sig. figs. On the LAST non-zero digit.
3) Non-zero digits are ALWAYS significant.
4) Zeroes in between two non-zero digits are significant. All other zeroes are insignificant.
Huh? I need more info to answer this
Are there choices we should be choosing from? Or do you just want an explanation?
