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First Semester Final Exam Part I Flashcards | StudBud
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First Semester Final Exam Part I
First Semester Final Exam Part I
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1
If 3 bings equal 1 jang and 3 jangs equal two tings, how many bings equal 4 tings?
12
36
6
18
2
Which is
NOT
true about copper-63 and copper-64?
they have the same number of protons
they have the same # of neutrons
they have different mass numbers
they are isotopes
3
Which is NOT true about fission reactions?
occur on the sun
involve splitting of a large nucleus
occur in nuclear power plants
neutrons maintain the reaction
4
A slice of bread turned brown in a toaster. The type of change that took place is ...
quantitative
extensive
chemical
physical
5
Which of these is NOT an indicator of chemical change?
color change
solidification
formation of precipitate
evolution of gas
6
Which of the following is not an extensive property?
volume
mass
density
moles
7
Which of these is an example of matter?
heat
flames
light
air
8
Which of these elements is
NOT
a representative element?
O
Zn
Al
Na
9
Which of the following is a physical change?
sugar browning
sugar digesting
sugar fermenting
sugar dissolving
10
4 grams of Ca reacts completely with 7 grams of Cl
2
. How much CaCl
2
is produced?
3 g
11 g
15 g
12 g
11
If a balance consistently gives 45.5g for an object that actually has a mass of 50.0 g it is
precise but not accurate
accurate but not precise
both accurate and precise
neither accurate nor precise
12
When a neutral atom of iron become a cation, its radius ...
decreases
remains the same
increases
13
30°C is how many Kelvins?
303 K
-243 K
243 K
203 K
14
What is the density of a 20.00 g object that raises the level in a graduated cylinder by 5 mL?
0.25 g/mL
4 g/mL
100 g/mL
0.4 g/mL
15
Which of the following elements has the largest first ionization energy?
phosphorus
sulfur
nitrogen
oxygen
16
Two liquids with different boiling point can be separated by the process called
filtration
evaporation
distillation
centrifugation
17
What is the % error if a weight that is actually 10 g is measured as 11 g?
10%
.1%
9.1%
-10%
18
Which is
NOT
true about Rutherford's model of the atom?
the atom is mostly empty space
most of the atom's mass is in the nucleus
Rutherford believed electrons were outside the nucleus
he believed electrons were only at specific energies
19
Which of the following is a homogeneous mixture?
salad
thousand island dressing
gasoline
ice cubes in water
20
Express 0.454 meters in millimeters.
45.4 mm
4.54 mm
4540 mm
454 mm
21
How many significant figures are there in 40,800 kg?
4
2
3
5
22
The average person passes 0.5L of gas per day. How many cm
3
is this?
500 cm3
250 cm3
100 cm3
100 cm3
23
When an electron moves from energy level 3d to energy level 2s, what happens?
energy is released
energy is aborbed
the atom is ionized
24
The difference between a theory and a law is ...
a law is more proven
a theory is not well tested
a theory is a proposed explanation
a theory explains a broad set of observations
25
Which of these means can be used to separate sodium from chlorine in NaCl?
evaporation
cannot be separated by physical means
distillation
filtration
