Chemistry Test #1 Flashcards

1
Q

Length

A

Meter

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2
Q

Volume

A

Liter

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3
Q

Mass

A

Gram

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4
Q

Dimensional Analysis

A

Given*(Desired/Given)=Desired

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5
Q

Precision

A

How close a series of measurements are to each other

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6
Q

Accuracy

A

How close a value is to an accepted value

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7
Q

Sig Figs

A
  1. All non-zero numbers are always significant
  2. Captive zeros are always significant
  3. If a decimal point is present, the trailing 0’s are significant
  4. If a decimal point is NOT present, trailing 0’s are NOT significant
  5. Leading 0’s are not significant
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8
Q

Adding/Subtracting Decimal Places

A

smallest # of decimal places

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9
Q

Multiplying/Dividing Sig Figs

A

the number with fewest sig figs that’s being multiplied is the number of sig figs in the answer

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10
Q

mixture

A

combination of two or more substances in any proportion

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11
Q

Compound

A

Substances in fixed proportions

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12
Q

Homogeneous

A

Same composition throughout

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13
Q

Heterogeneous

A

Varies in its composition

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14
Q

Solution

A

Homogeneous mixture with tiny particles (to small to see/settle or be filtered out.

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15
Q

Colloid

A

Homogeneous mixture with medium-sized particles (big enough to see, to small to settle or be filtered out)

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16
Q

Suspension

A

Homogeneous mixture with large particles (big enough to see & be filtered out)

17
Q

Elements

A

Substances that are unable to be broken down further, atom is the smallest particle

18
Q

Compounds

A

Two or more different elements that are chemically combined

19
Q

Phase

A

Physical Property

20
Q

Color

A

Physical Property

21
Q

Odor

A

Physical Property

22
Q

Flammability

A

Chemical Property

23
Q

Boiling Point

A

Physical Property

24
Q

Melting Point

A

Physical Property

25
Density
Physical Property
26
Reactivity
Chemical Property
27
Physical Property
Can be observed/measured without changing the composition
28
Chemical Property
Can only be observed during or after a chemical reaction
29
Chemical Change
a substance becomes another having a different composition & properties not reversible using ordinary physical means
30
Compunds can be
separated into elements by chemical means
31
Un-mix mixtures through
Filteration, Distillation & a Seperatory Funnel
32
Chromatography
Separating Components in a Mixture
33
Percent Error
(M-A)/A*100