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Mingala ba !

Mingala ba !. Do Now: Take out HW and stampsheet Answer Q below in notes. How many sig figs in each number and state the reason why?. 6 3 5 5 2 4 6. 45.8736 .000239 .00023900 48000. 48000 3.982  10 6 1.00040. All digits count Leading 0’s don’t

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Mingala ba !

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  1. Mingalaba! • Do Now: • Take out HW and stampsheet • Answer Q below in notes. • How many sig figs in each number and state the reason why? 6 3 5 5 2 4 6 45.8736 .000239 .00023900 48000. 48000 3.982106 1.00040 All digits count Leading 0’s don’t Trailing 0’s do 0’s count in decimal form 0’s don’t count w/o decimal All digits count 0’s between digits count as well as trailing in decimal form

  2. Scientific Notation Make the following into a 3 Sig Fig number 1,558.7 .0037421 136,700,000 128,522 0.000016683 1.56x103 3.74x10-3 1.37x108 1.29x105 1.67 10-5

  3. Multiplication and division 32.27  1.54 = 49.6958 3.68  .07925 = 46.4353312 1.750  .0342000 = 0.05985 3.2650106 4.858 = 1.586137 107 6.0221023 1.66110-24= 1.000000 49.7 46.4 .05985 1.586 107 1.000

  4. Addition and Subtraction Look for the last important digit .56 + .153 = .713 82000 + 5.32 = 82005.32 10.0 - 9.8742 = .12580 10 – 9.8742 = .12580 .71 82005 .1 0 __ ___ __

  5. Solve each of the following problems. Show the correct set-up and always use units. • Determine the number of mm in 1600 m. • Convert 2875 dLto liters. • Convert 2500 mL of hydrochloric acid (HCl) to L of HCl. • Convert 0.049 kg sulfur (S) to g of S • Convert 150 mg of acetylsalicylic acid (aspirin) to g of aspirin.

  6. Convert 5.2 x 10-4 Mm of magnesium (Mg) ribbon to mm of Mg ribbon • Convert 0.020 kg of tin (Sn) to mg of Sn

  7. Convert 26.7 cm of copper (Cu) wire into dmof Cu wire. • Convert 0.50 g of sodium (Na) to nanogramsof Na. • How long is a microcentury in minutes? • How long is a Gigaminute in hours?

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