CHEM 111 TEST 102 Questions with Verified Answers,100% CORRECT
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Course
CHEM 111
Institution
CHEM 111
CHEM 111 TEST 102 Questions with Verified Answers
As part of the calibration of a new laboratory balance, a 1.000 g mass is weighed with the following results:
Trial 1: 1.201 +/- 0.001
Trial 2: 1.202 +/- 0.001
Trial 3: 1.200 +/- 0.001
The balance is: - CORRECT ANSWER Precise but inaccurate
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CHEM 111 TEST 102 Questions with Verified Answers
As part of the calibration of a new laboratory balance, a 1.000 g mass is weighed
with the following results:
Trial 1: 1.201 +/- 0.001
Trial 2: 1.202 +/- 0.001
Trial 3: 1.200 +/- 0.001
The balance is: - CORRECT ANSWER Precise but inaccurate
______ are substances with constant composition that can be broken down into
elements by chemical processes. - CORRECT ANSWER compounds
Which of the following is not a unit in the SI system? - CORRECT ANSWER calorie
A species with 12 protons and 10 electrons is - CORRECT ANSWER Mg 2+
Which statement is incorrect - CORRECT ANSWER An atom of 18O has an equal
number of protons and neutrons
A solution is also called a - CORRECT ANSWER homogenous mixture
The agreement of a particular value with the true value is called - CORRECT
ANSWER accuracy
How many significant figures should be reported for the difference between
18.66172 mL and 18.57 ml - CORRECT ANSWER 4
Using rules of the significant figures, calculate the following 6.167+68/5.10 -
CORRECT ANSWER 15
The melting point of picolinic acid is 136.5 C. What is the melting point of picolinic
acid on the Fahrenheit scale? - CORRECT ANSWER 277.7 F
, An ion is formed - CORRECT ANSWER by either adding or subtracting electrons
from the atom
Which of the following statements from Dalton's atomic theory is no longer true,
according to the modern atomic theory? - CORRECT ANSWER All atoms of a given
element are identical
Which of the following are incorrectly paired - CORRECT ANSWER O, halogen
We generally report a measurement by recording all of the certain digits plus ___
uncertain digit(s) - CORRECT ANSWER one
Avogadro's hypothesis states that - CORRECT ANSWER At the same temperature
and pressure, equal volumes of different gases contain an equal number of
particles
Which of the following atomic symbols is incorrect - CORRECT ANSWER 14/8N
By knowing the number of protons a neutral atom has, you should be able to
determine - CORRECT ANSWER two of the above
The numbers of protons, neutrons, and electrons in K+ are - CORRECT ANSWER 19
p, 10 n, 18 e
How many oxygen atoms are there in one formula unit of Ca3(PO4)2 - CORRECT
ANSWER 8
The correct name for P3- is - CORRECT ANSWER phosphide ion
You are given a compound with the formula MCl2, in which M is a metal. You are
told that the metal ion has 24 electrons. What is the identity of the metal -
CORRECT ANSWER Fe
The molar mass of the compound formed by sodium and selenium is - CORRECT
ANSWER 124.9 g/mol
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