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Straighterline Chemistry Final exam questions and answers 2024.
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Straighterline Chemistry Final exam questions and answers 2024.
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StraighterlineChemistry Final
exam questions
and answers
2024
findings that are summarized based on a pattern or
trend
Law
tentative explanation for a set of observations
Hypothesis
If a liquid contains 60% sugar and 40% water
throughout its composition then what is it called?
Homogeneous mixture
does not have a uniform composition throughout
Heterogeneous mixture
represents a physical change?
,Water, when heated, forms steam.
How many micrograms are in 65.3 kg?
e. 6.53 × 1010 μg
A smart phone has dimensions of 4.9 inches
(height), 2.3 inches (width) and 8.0 millimeters
(depth). What is the volume of the smart phone in
cubic centimeters? (1 in = 2.54 cm)
58 cm3
Given that 1 inch = 2.54 cm, 1.00 cm3 is equal to
0.0610 in3
What terms defines a mass which is exactly equal
to 1/12 the mass of one carbon-12 atom?
Atomic mass unit
How many neutrons are there in an atom of lead
whose mass number is 208?
126
Which of these elements is chemically similar to
magnesium?
Calcium
C(graphite) and C(diamond) are examples of:
allotropes of carbon.
The 80Br- ion has
35 protons, 45 neutrons, 46 electrons.
The formula for sodium sulfide is
Na2S
,Which one of the following formulas of ionic
compounds is the least likely to be correct?
Ca2NO3
What is the name of ClO - ion?
hypochlorite
Which of the following is a molecular formula for a
compound with an empirical formula of CH?
C6H6
What is the energy in joules of a mole of photons
associated with red light of wavelength 7.00 × 102
nm? (c = 3.00 × 108 m/s; h = 6.63 × 10-34 J • s; NA
= 6.022 × 1023 /mole)
1.71 × 105 J
Which is the correct electron configuration for
gold?
[Xe]4f145d106s1
Use the Rydberg equation to calculate the
frequency of a photon absorbed when the
hydrogen atom undergoes a transition from n1 = 2
to n2 = 4. (R = 1.096776 × 107 m-1; c = 3.00 × 108
m/s)
6.17 × 1014 s-1
A 6.0-gram champagne cork is shot out of an
opened champagne bottle and traveled at a speed
of 65 km/hour. Calculate the de Broglie wavelength
(in meters) of the cork.
6.1 × 10-33 m
, A(n) _________ is a point at which a standing wave
has zero amplitude.
node
Calculate the wavelength associated with a 20Ne+
ion moving at a velocity of 2.0 × 105 m/s. The
atomic mass of Ne-20 is 19.992 amu. (1 amu = 1.66
× 10-24 g and h = 6.63 × 10-34 J • s)
1.0 × 10-13 m
The Pauli exclusion principle states that no ____
electrons within an atom can have the same ____
quantum numbers.
2; 4
Emission spectra
can be used to identify unknown atoms.
Which one of the following equations correctly
represents the process relating to the ionization
energy of X?
X(g) → X+(g) + e-
How does atomic radius change as you move
across the periodic table?
Atomic radius decreases moving from left to right
across a period and increases from top to bottom.
Which of these choices is the electron
configuration of the iron(III) ion?
a. [Ar]3d5
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