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  Non-zero digits are significant.  Ex: 453 kg  All non-zero digits are always significant  # of Sig Fig’s?  3! Rule 1:
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Presentation transcript:

Welcome Back! If you have schedule issues, you must request to see your counselor. Find your next blank left page. Number it 70. Continue numbering until 75. Fold pg 71 to make a pocket. Tape it to pg 70. Title Pg 72 “The Mole” Glue “Unit 7:The Mole” to Pg 73.

Meet your TEAM! Go around and fill in the blanks Hi my name is ________________________ I really enjoy doing ___________ in my free time. If I could be any flavor ice cream I would be _______. Then choose a card from the questions. Read it out loud and answer it.

Welcome Back! A few new changes… Remind (you win). Text @chem148 to 81010 Mastery Progress & Summative Grades Done with phones

Header Pg 74: I can review sig figs and DA SigFig Rules: Leading zeros don’t count Middle zeros always count If there is a decimal, the zeros behind count. Use the least number of sigfigs for rounding 0.065 8900 7066 0.6080

Math Calculations with Sigfigs: Use parenthesis around numerator and denominator Round to sig figs Remember to get the x10i 2nd , #

213.45 23.77 × 108

6.06 × 2.76 26× 1.806 𝑥10 −2