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General Chemistry > Quiz 1 (chapter 1) > Flashcards

Quiz 1 (chapter 1) Flashcards

(56 cards)

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1
Q

Amount of substance

A

Mole (mol)

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2
Q

Electric current

A

Ampere (A)

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3
Q

Luminous intensity

A

Candela (cd)

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4
Q

Temperature definition

A

Measure of the average amount of kinetic energy in atoms/molecules

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5
Q

Heat determines?

A

The direction of energy

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6
Q

Thermal energy transfers from?

A

Hot to cold objects

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7
Q

Similarity of K and C

A

Celsius and Kelvin are the same size

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8
Q

Speciality of F

A

Fahrenheit is 5/9 the size of Celsius

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9
Q

Kelvin’s coldest temperature

A

0 K

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10
Q

Celsius’ coldest temperature

A

-273 C

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11
Q

Fahrenheit’s coldest temperature

A

-459 F

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12
Q

Temperature scale conversion formula C —> F

A

C= (F-32) / 1.8

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13
Q

Temperature Scale Conversion formula K —> C

A

K= C + 273.15

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14
Q

Prefix multiplier definition

A

Changes the value of the unit by the powers of 10 u

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15
Q

1 mega

A

10^6 (g,m,L)

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16
Q

1 kilo

A

10^3 (g,m,L)

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17
Q

1 deci

A

10^-1 (g,m,L)

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18
Q

1 centi

A

10^-2 (g,m,L)

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19
Q

1 milli

A

10^-3 (g,m,L)

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20
Q

1 micro

A

10^-6 (g,m,L)

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21
Q

1 nano

A

10^-9 (g,m,L)

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22
Q

1 pico

A

10^-12 (g,m,L)

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23
Q

Derived unit definition

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A

Combination of other units

24
Q

Volume definiton

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A

Measure of space (cm^3 or L)

25
Density definition
Ratio of a substance’s mass to volume (g/cm^3) (g/L)
26
Density affects?
If a substance will sink or float in another (less dense = floats)
27
Intensive property definition
Characteristic that is independent of the amount of a substance (doesn’t matter how much substance there is)
28
Intensive property examples
Density & temperature
29
Extensive property definition
Characteristic that is dependent of the amount of substance (amount of substance affects the property)
30
Extensive property examples
Mass & change of enthalpy (delta H)
31
Significant figures definition
Reflects precision (preserves)
32
The precision of a measurement depends on
The instrument used
33
SG RULES 1. Zeroes to the left of a first nonzero digit (0.0032)
Not significant ( 2 SG)
34
SG RULES 2. Zeroes after a decimal point (45.000)
Significant (5 SG)
35
SG RULES 3. No decimal point (1200 or 1200.)
Ambiguous (wrong)
36
SG RULES 4. When number is ambiguous (1200)
Use scientific notation (1.200 x 10^3)
37
SG RULES 5. Exact numbers -discrete objects (people, apples) -numbers in an equation (Ek) -defined quantities like conversions (10dm=1m)
Unlimited
38
SG RULES 6. Multiplication/Division
Same SG as factor with fewest SG
39
SG RULES 7. Addition/Substraction
Same #of decimal places as factor with fewest
40
SG RULES 8. Rounding up or down
DOWN If last digit is 4 or less UP if last digit is 5 or more
41
SG RULES 9. Round at the ?
END ( keep track of sig figs by underlying the least significant digit)
42
SG for beaker
No decimal (21 ml)
43
SG for graduated cylinder
1 decimal (21.0ml)
44
SG for pipette
2 decimals (21.00 ml)
45
SG for burette
2 decimals (21.00 ml)
46
Accuracy definition
How close the measured value is to the EXACT VALUE
47
Precision definition
How close a series of measurements are to one another (FLUCTUATES)
48
Random error?
-has the equal probability of being too high or too low -not consistent -leads to imprecise data
49
Systematic error?
-tends toward being either too high or too low -not close to true mass -leads to inaccurate data
50
Dimensional Analysis definition
Unit conversion method to solve problems (Units should ALWAYS be included)
51
Conversion factor?
Fractional quantity of a unit equation (Units converting TO / Units converting FROM)
52
Dimensional Analysis formula
Desired answer= given unit x (desired / given)
53
When units are raised to a power?
Raise both the number AND the unit to the power
54
Conversion 1ml = ?
1 cm^3
55
Conversion 1L=?
1 dm^3
56
Conversion 1 cm^3 =?
10^-3 L

General Chemistry (2 decks)

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