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Chemistry Ch 2: Inquiry, Sig Figs, Energy Flashcards | StudBud
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Chemistry Ch 2: Inquiry, Sig Figs, Energy
Chemistry Ch 2: Inquiry, Sig Figs, Energy
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Chemistry Ch 2 from Holt Chemistry 2006
Flashcards
16 cards
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Questions
16
Answers
1
Poor precision in scientific measurement may arise from
a strict standard that is too strict
limits of the measurement device
both human error and limited measuring device
human error
2
Five darts strike near the center of the target. Whoever threw the darts is...
neither accurate or precise
accurate and precise
accurate
precise
3
A theory is an accepted explanation of a phenomenon until
repeated data and observation conflicts with the theory
one study conflicts with the theory
scientists disagree about the research methods used
an important scientist disagrees with it
4
"In any chemical or physical process, energy is neither created or destroyed" is a statement
law of conservation of physical changes
law of conservation of systems
law of conservation of mass
law of conservation of energy
5
For every investigation the scientific method
must be abandoned if there are unexpected results.
helps to predict the results.
is the same set of procedures
is a logical set of procedures
6
In an endothermic reaction energy is...
absorbed
released
7
A temperature of 323K is equivalent to...
-500C
500C
1.20C
5960C
8
The specific heat of a given substance...
is the same for every other substance.
is unique to that substance.
varies with temperature.
depends on its mass.
9
Precision pertains to all of the following
except
sameness of measurements.
agreement among numerical values.
reproducibility of measurements.
closeness to an accepted value.
10
The reason for organizing, analyzing, and classifying data is
so that computers can be used
separate types of data.
to prove a law
to find relationships in the data
11
The temperature that is equivalent to 20
o
C is...
293K
-293K
13.7K
253K
12
The energy that results form the breaking or formation of chemical bonds is...
potential energy
chemical emergy
kinetic energy
temperature
13
Which has 4 sig figs?
0.00402
30.00
402.10
0.0020
14
GIve the number of sig figs: 170.040
5
4
3
6
15
In an exothermic reaction energy is...
absorbed
released
16
A plausible explanation of a body of observed natural phenomenon is a scientific...
principle
law
theory
fact
