Straighterline Chemistry Final Exam 2024/2025- QUESTIONS AND ANSWERS
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Module
Straighterline Chemistry
Institution
Straighterline Chemistry
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 throughou...
Straighterline
Chemistry Final Exam
2024/2025-
QUESTIONS AND
ANSWERS
,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
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