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General Chemistry > Quiz 1 (chapter 1) > Flashcards

Quiz 1 (chapter 1) Flashcards

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

A

Combination of other units

24
Q

Volume definiton

A

Measure of space (cm^3 or L)

25
Q

Density definition

A

Ratio of a substance’s mass to volume (g/cm^3) (g/L)

26
Q

Density affects?

A

If a substance will sink or float in another
(less dense = floats)

27
Q

Intensive property definition

A

Characteristic that is independent of the amount of a substance
(doesn’t matter how much substance there is)

28
Q

Intensive property examples

A

Density & temperature

29
Q

Extensive property definition

A

Characteristic that is dependent of the amount of substance (amount of substance affects the property)

30
Q

Extensive property examples

A

Mass & change of enthalpy (delta H)

31
Q

Significant figures definition

A

Reflects precision (preserves)

32
Q

The precision of a measurement depends on

A

The instrument used

33
Q

SG RULES
1. Zeroes to the left of a first nonzero digit (0.0032)

A

Not significant ( 2 SG)

34
Q

SG RULES
2. Zeroes after a decimal point (45.000)

A

Significant (5 SG)

35
Q

SG RULES
3. No decimal point (1200 or 1200.)

A

Ambiguous (wrong)

36
Q

SG RULES
4. When number is ambiguous (1200)

A

Use scientific notation (1.200 x 10^3)

37
Q

SG RULES
5. Exact numbers
-discrete objects (people, apples)
-numbers in an equation (Ek)
-defined quantities like conversions (10dm=1m)

A

Unlimited

38
Q

SG RULES
6. Multiplication/Division

A

Same SG as factor with fewest SG

39
Q

SG RULES
7. Addition/Substraction

A

Same #of decimal places as factor with fewest

40
Q

SG RULES
8. Rounding up or down

A

DOWN If last digit is 4 or less
UP if last digit is 5 or more

41
Q

SG RULES
9. Round at the ?

A

END ( keep track of sig figs by underlying the least significant digit)

42
Q

SG for beaker

A

No decimal (21 ml)

43
Q

SG for graduated cylinder

A

1 decimal (21.0ml)

44
Q

SG for pipette

A

2 decimals (21.00 ml)

45
Q

SG for burette

A

2 decimals (21.00 ml)

46
Q

Accuracy definition

A

How close the measured value is to the EXACT VALUE

47
Q

Precision definition

A

How close a series of measurements are to one another (FLUCTUATES)

48
Q

Random error?

A

-has the equal probability of being too high or too low
-not consistent
-leads to imprecise data

49
Q

Systematic error?

A

-tends toward being either too high or too low
-not close to true mass
-leads to inaccurate data

50
Q

Dimensional Analysis definition

A

Unit conversion method to solve problems
(Units should ALWAYS be included)

51
Q

Conversion factor?

A

Fractional quantity of a unit equation

(Units converting TO / Units converting FROM)

52
Q

Dimensional Analysis formula

A

Desired answer= given unit x (desired / given)

53
Q

When units are raised to a power?

A

Raise both the number AND the unit to the power

54
Q

Conversion 1ml = ?

A

1 cm^3

55
Q

Conversion 1L=?

A

1 dm^3

56
Q

Conversion 1 cm^3 =?

A

10^-3 L

General Chemistry (2 decks)

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