0 10 Q() 30 40 50 60 70 aD gO 100

~600 800 qoo Answer:

,j I . ,(

0 2. :3 5 6 7 8 '1 10

THE TRIPLE AND FOURBEAM BALANCES

Name _

What masses are shown on each of the following balances?

Triple Beam Balance

0 10 20 30 40 50 60 70 ao qO 100

° 100 2.00 300 "l00 500 600 700 800 qoo 1000

Answer:0 2. 3 4 5 7 B q (0

y--y---y----y--0 10 2.0 ~o ""\0 50 60 70 BO qo 100

0 100 2.00 2100 400 500 600 700 800 1000 Answer:0 "3 4 5 6 7 8 10

Four Beam Balance 0 100 200

0 \0 20 30 40 50 60 70 80 gO 100

Answer: 0 2 3 4 5 6 7 8 'I 10

0 0.1 0,2 0,3 0,4- 0,5 0,6 0,7 0.8 0.'1 1.0

,~

;;<

0 10 20 30 40 60 70 BO roo,:;:;

0 \ 2. 3 4 5 6 7 8J q 10 Answer:I I !IIII mill 11\1111 11\\11\ I \ \I I1l!llIlllllllllm9m 1llllHllll,lll 1111IIIIIrI1lTfTll11iTITl11

0 0.1 0.2 0.3 0.4 0,5 0.6 0.7 o.e 0.<1 LO~.\

0 100 200

0 10 2.0 30 40 50 60 70 80 qO 100

Answer: .,

0 2- 3 4 5 6 7 8 q 10 ,-;!'i':-~::,~

0 O. \ 0.2. 0.3 0.4- 0.5 0.7 o.B o.q 1.0 -~f_

!]

Chemistry IF8766 3 ©Instructional Fair, Inc.

MEASURING LIQUID VOLUME Name _

What volume is indicated on each of the graduated cylinders below? The unit of voleismL.

60

I4

50 2S

'3 Ia) b) c)

I I

r:-;

251 80

2.0 75 4

is/ I ---70 3

651

10

ct) e) f)

I II401 I

30 3

20 2.

I 40fa f

J ---

g) h) f)

Chemistry IF8766 4 ©Instructionc_ .. _ ._. ___ ••. __ ,_ •. ___ .,_ •• _._"" ____ ~,. ___ • __ , __ '._ .• ____ •. _._ .• _ •• w. ___ , _____ ·___ ~ _____ ~·_· ___ •· __ ~·_·

2.0

READING THERMOMETERS Name _

What temperature is indicated on each of the thermometers below?

10

5

o

-10

- .•...-10

- ..•..-0

SCIENTIFIC NOTATION Name _

Scientistsvery often deal with very small and very large numbers, which can lead to a lot 0\confusion when counting zeros! We have learned to express these numbers as powers of 10

Scientific notation takes the form of M x lon where 1-::;M < 10 and "n" represents the numberof decimal piaces to be moved. Positive n indicates the standard form isa large number.Negative nindicates a number between zero and one.

Example 1: Convert 1,500,000 to scientific notation.We move the decimal point so that there is onlyone digit to its left, a total of 6 places.

1,500,000 = 1.5 x 106

Example 2: Convert 0.000025 to scientific notation.For this, we move the decimal point 5 places to theright.

0.000025 = 2.5 x 10-5(Note that when a number starts out less than one,the exponent is always negative.)

Convert the following to scientific notation.

1 . 0.005 = 6. 0.25 ::

2. 5,050 = 7. 0.025 =

3. 0.0008 = 8. 0.0025 =

4. 1,000 = 9. 500 =t; 1,000,000 == 10. 5,000 =v.

Convert the following to standard notation.

1. 1.5 x 103= _ 6. 3.35 X 10-1 ;:

7. 1.2 X 10-4 ;:

8. 1 x lQ4 ::

9. 1 X 10-1 ==

10. 4x 10° .-

2. 1.5 X 10-3 ;: _

3. 3.75 X 10-2 ;: _

4. 3.75 X 102 =: ~_

5. 2.2x lOS = __ ~ _

8 ©Instructionai Fair, i"eChemistry' IF8766- - ~ i'

SIGNIFICANT FIGURES Name _

)f10.

A measurement can only be as accurate and precise as the instrument that produced it.A scientist must be able to express the accuracy of a number, not just its numerical value.We can determine the accuracy of a number by the number of significant figures itcontains.er

1) All digits 1-9inclusive are significant.Example: 129has 3 significant figures.

2) Zeros between significant digits are always significant.Example: 5,007 has 4 significant figures.

3) Trailing zeros in a number are significant only if thenumber contains a decimal point.Example: 100.0has 4 significant figures.

I 100has 1significant figure.I 4) Zeros in the beginning of a number whose only function

ls to place the decimal point are not significant.Example: 0.0025 has 2 significant figures.

5) Zeros following a decimal significant figure aresignificant.Example: 0.000470has 3 significant figures.

0.47000 has 5 significant figures.

Determine the number of significant figures in the foilowing numbers.i. 0.02 6. 5,000.

2. 0.020 7. 6,051.00

3, 501 B. 0.0005

4. 501.0 9. 0.1020

5. 5,000 10. 10,001

Determine the location of the last significant place value by placing a bar over the digit.(Example: 1.700)

1, 8040 6. 90,100

7. 4.7 x 10-8

8. 10,800,000.

9, 3.01 x 1021

10. 0.000410

9

2, 0,0300

3, 699.5

4, 2,000 x 102

5. 0.90100

Chemistry IF8766 ©Instructional Fair, Inc.

l TEMPERATURE ANDITS MEASUREMENT

Name _

Temperature (which measures average kinetic energy of the molecules) can bemeasured using three common scales: Celsius,Kelvin and Fahrenheit We use thefollowing formulas to convert from one scale to another. Celsius isthe scale mostdesirable for laboratory work. Kelvin represents the absolute scale. Fahrenheit isthe oldEnglishscale which isnever used in lab.

°C :::K - 273 K :::°C + 273of::: 9/50C + 32°C::: 5/geF - 32)

Complete the following chart. All measurements are good to 1°C or better.

--------------~-----~4-5-0-K-----~--------------1

294K

_______. 4- -+ 9_8_,6_0_F lll-273° C .

225 K

Chemistry IF8766 ©Instructionol12