Chemistry CP

Everyday Conversions in NB

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1. How many pennies are in 1 dollar?100 pennies=1 dollar

2. How many dollars is in 18970 pennies?$189.70

3. How many pennies are in 23 dollars?2300 pennies

Metric System Scale in NB

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BigSmall

1Base Units

(g,m,L)

10Ten

Deka(da)

100Hundred

Hecto(h)

1000Thousand

Kilo(k)

0.1TenthDeci(d)

0.01Hundredth

Centi(c)

0.001Thousandth

Milli(m)

Multiple

Division

Metric System Prefixes

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Metric Units Prefix Symbol

1,000,000,000,000 1012 tera T

1,000,000,000 109 giga G

1,000,000 106 mega M

1,000 103 kilo k

100 102 hecto h

10 10 deka da

 

0.1 10-1 deci d

0.01 10-2 centi c

0.001 10-3 milli m

0.000001 10-6 micro μ

0.000000001 10-9 nano n

0.000000000001 10-12 pico p

Metric System International System of Units (SI)

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• Length – meter (m)• Mass – gram (g)• Volume – liter (L or l)• Time – second (s)• Temperature – Celsius (C) or Kelvin (K)• Amount of substance – Mole (mol)• Energy- Joule (J)

How Do “Measure” Chemistry? •Metric System (International System of Units)•Significant Figures• Scientific Notation•Dimensional Analysis

Significant Figures Rules in NB

1. Non-zero digits are always significant.26.38= 4 SF

2. Any zeros between two significant digits are significant. (Captured Zeros)406= 3 SF91,600= 3 SF

3. A final zero or trailing zeros in the decimal portion ONLY are significant. 0.00500= 3 SF0.03040= 4 SF

Metric and Significant Figures Homework in NB

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Show your work (conversion factor).1. 1.93 m= 193 cm2. 50 cm= 0.0005

km3. 1000 g= 1 kg4. 14,576 L= 145.76

hL5. 658 dag= 6580 g

How many significant figures?6. 3.0800 5 SF7. 0.00418 3 SF8. 7.09 x 105 3 SF9. 91,600 3 SF 10. 0.003005 4 SF11. 3.200 x 109 4 SF12. 780,000,000 2 SF13. 0.0101 3 SF

Significant Figures Rules in NB

1. Non-zero digits are always significant.26.38= 4 SF

2. Any zeros between two significant digits are significant. (Captured Zeros)406= 3 SF91,600= 3 SF

3. A final zero or trailing zeros in the decimal portion ONLY are significant. 0.00500= 3 SF0.03040= 4 SF

Metric System Tools•Mass (g): gram scale

• Length (m): Ruler and Meter Stick

• Volume (L): Graduated Cylinder

Metric Lab in NB1. Length Measurements (3 SF)• Diameter Penny (cm)• Height Lab Counter (cm)• Width of Textbook (cm)• Length of Room (m)

Diameter of Penny

Height of Lab

Counter

Width of Textbook

Length of Room

km km km km

m m m m

cm cm cm cm

mm mm mm mm