MODULE 3 Flashcards

1
Q

known as “metric system”

A

SI UNIT

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2
Q

measure of the quantity of matter

A

MASS

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3
Q

force gravitational attraction between that matter on earth

A

WEIGHT

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4
Q

SI unit for the amount of a chemical substance

A

MOLE

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5
Q

mass in grams of 1 mol

A

MOLAR MASS

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6
Q

1/1000 of a mole and the mass in grams of millimole

A

MILLIMOLE

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7
Q

most effective way of describing a solute concentration in a solution

A

MOLAR CONCENTRATION

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8
Q

total number of moles of a solute in 1L of a solution

A

MOLAR ANALYTICAL CONCENTRATION

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9
Q

molar concentration of a particular species in a solution

A

MOLAR EQUILIBRIUM CONCENTRATION

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10
Q

mass of a substance per unit volume

A

DENSITY

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11
Q

ratio of the mass of a substance to the mass of an equal volume of water

A

SPECIFIC GRAVITY

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12
Q

relationship among the numbers of moles of reactants and products represented by balanced chemical reactions.

A

STOICHIOMETRY

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13
Q

simplest whole number ratio of atoms in a chemical compound.

A

EMPIRICAL FORMULA

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14
Q

specifies the number of atoms in a molecules

A

MOLECULAR FORMULA

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15
Q

sample size that are carried through an analysis in exactly the same way.

A

REPLICATES

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16
Q

also called “arithmetic mean” or “average”, obtained by dividing the sum or replicate measurements by the number of
measurements.

A

MEAN

17
Q

number that occurs most often in a data set.

A

MODE

18
Q

middle value in a set of data arranged in numerical order.

A

MEDIAN

19
Q

result differ significantly from others in the set.

A

OUTLIER

20
Q

significant effect on the mean, no effect on the median.

A

OUTLIER

21
Q

closeness of the results to others obtained in exactly the same way.

A

PRECISION

22
Q

closeness of a measured value to the true value.

A

ACCURACY

23
Q

difference between the measured value and the true value.

A

ABSOLUTE ERROR

24
Q

more useful quantity than the absolute error.

A

RELATIVE ERROR

25
Q

causes data to be scattered more or less symmetrically
around a mean value.

A

RANDOM ERROR

26
Q

equal to the square of the standard deviation.

A

VARIANCE

27
Q

causes mean of a data set to differ from the accepted
value, affects the accuracy.

A

SYSTEMATIC ERROR

28
Q

substances sold by NIST and contain concentration of an
analytes.

A

STANDARD REFERENCE MATERIALS

29
Q

occurs with the use of handwritten label and request forms.

A

CLERICAL ERROR

30
Q

usually occur only occasionally, may cause a result to be either high or low.

A

GROSS ERROR

31
Q

measures the systematic error associated
with an analysis, negative or positive sign.

A

BIAS

32
Q

curve that show the symmetrical distribution of data

A

GAUSSIAN

33
Q

all of the certain digits plus the uncertain digit.

A

SIGNIFICANT FIGURE