Lecture5

# Lecture5 - Chem 1P Lecture 5 Numerical problems Chang...

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Chem 1P Lecture 5: Numerical problems

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Numerical problems are real Chang Section 1.7 - 1.9 Thruster performance was not converted to SI units: orbiter destroyed in atomsphere Mars Climate Orbiter 125 million dollar loss Gimli Glider Fuel quantity was not properly converted to metric units: plane ran out of fuel
Numerical problems are real Chang Section 1.7 - 1.9 Patient received wrong dose of phenobarbital due to incorrect use of SI units Each year thousands of patients die because of medical miscalculations in dose, weight, height, drug units, or solution volume

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WileyPlus Convert the decimal number 741.00 into standard scientific notation with the correct number of significant digits. Chang Section 1.7 - 1.9 WileyPlus: Precision unit quiz 7.4100 x 10 2 Convert the number 0.9 × 10 -3 into a decimal number with the correct number of significant digits. Do not forget to put "0" before decimal point if your answer is less than 1. 0.0009
WileyPlus Chang Section 1.7 - 1.9 WileyPlus: Precision/Applied precision unit quiz A pure solid has a density of 6.8100 g/mL. What is the mass (g) of 59.59 mL of the pure solid expressed to the correct number of significant figures? = 405.8 g d = m V m = d x V m = 6.8100 g/mL x 59.59 mL = 405.8079 g

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WileyPlus Calculate to the correct number of significant figures the grams of sodium nitrate that are present in 316.07 mL of
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## This note was uploaded on 11/23/2010 for the course CHEM Chem 1P taught by Professor Ericpotma during the Winter '10 term at UC Irvine.

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Lecture5 - Chem 1P Lecture 5 Numerical problems Chang...

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