FinalExam review

Five steps of the Scientific Method: a,b,c,d,e

a: observe

b: hypothesis

c: materials

d: procedure

e: conclusion

difference between qualitative and quantitative
quant: quantity

  1. Calculate the following: (you may use a calculator)

    a. (1.3 x 10-4) x (3.6 x 106) : 

    b. (2.3 x 104) ? (1.1 x 102) : 

c. (5.6 x 109) + (1.0 x 102) : 

 

d. (2.9 x 10-2) – (1.0 x 102)

a

b

c

d

Put the following in scientific notation. 

a. 56790

b. 1,000,000

c. .0056

d. .203

a. 5.679 * 10^4

b. 10^6

c. 5.6*10^-3

d. 2.03*10^-1

# of sig figs? 
a. 23400

b. 0.987

c. 34

d. 0.00987

e. 685.990                 f. 101420 

a. 3 

b. 3

c. 2

d. 3

e. 6

f. 5

Calculate with sig figs:

a. 23.500 + 78.0232

b. 0.0983 * 4532.1

c. 45.67 – 0.98

d. 450 – 25.5

a. 101.523

b. 446

c. 45

d. 420

Round to sig fig in ()
a. 8590.3 (4)

b. 0.0074 (1)

c. 23.845 (4)

d. 130.88 (3) 

a. 8590.

b. .007

c. 23.85

d. 131

Units and instrument for each
a. Length

b. Mass

c. Temp

d. Volume 

a. meters– meter stick

b. kg– scale

c. Celcius– Thermometer

d. Liters– graduated cylinder 

# of exponent to the prefix

a. kilo                  b. milli

c. nano                d. Mega

e. centi               f. Micro

a. 3

b. -3

c. -9

d. 6

e. -2

f. -6

Calculate: 
a. 1500 km= _m

b. 2.5 pg= _mg

c. 539.54 nm= _Mm

d. 34 m^3= _cubic cm 

Get help from Cottingham
formula: Density
D=m/v
An object has mass of 25g and volume of 6.5cm^3. What’s the Density?
25/6.5 g/cm^3
A brick has a mass of 105.8g. It is the form of a rectangular block with the dimensions of 11.13cm, 22.25cm, and 33.54cm. What is the density?
D=.01273
The Density of water is known to be 1.00g/cm^3. The sample we used had a mass of 35.28g. What was the volume of the water?
Volume=35.28g

Convert the following: 

a. 56.5C= _K 

b. 210K= _C

a. 329.5K

b. -63C

What is the law of conservation of mass?
Mass is not created or destroyed.

What are the three main states of matter? 

 

a. solid

b. liquid

c. gas

Define matter
Anything that has mass and takes up space.

Physical or Chemical properties?

a. the car is red

b. the element ignited when put in water.

c. The melting point is 18C

d. it reacts with oxygen

a. p

b. c

c. p

d. c

Physical or Chemical change?

a. cutting a piece of paper

b. burning gasoline

c. a car rusts

d. a chocolate bar melts

a. p

b. c

c. c

d. p

Define element
A pure chemical substance
Define compound
a pure chemical substance consisting of two or more different chemical elements that can be separated into simpler substances
Define mixture
When two substances are mixed but not combined chemically
Define Pure Substance
Stubstances are called “pure” to set them apart from mixtures.
Define homogeneous
same
Define heterogeneous
mixed

HomoX or heteroY 

a. beach sand

b. salt dissolved in water

c. kechup

d. beef stew

e. milk                  f. bowl of fruit loops

a. X

b. Y

c. Y

d. X

e. Y

f. X

What are the four methods of separating substances physically?

a. filtration

b. exraction 

c. decanting

d. evaporation

What is the law of constant composition?
Matter is not created or destroyed
What did dalton contribute to the atomic theory?
Ask Cottingham
What did Michael Faraday contribute to the atomic theory?
Ask cottingham
What did Ben Franklin contribute to the atomic theory?
Ask cottingham