1|Page
CHEM 101 FINAL IVY TECH EXAM | WITH COMPLETE
QUESTIONS AND ANSWERS | 2025/206 LATEST UPDATED | 100
% RATED AND VERIFIED SOLUTIONS | GET AN A+
What is the mass percent of hydrogen in water?
a: 5.60
b: 11.2
c: 33.3
d: 88.8 - (ANSWER)b
How many atoms are in 5.80 moles of He?
a: 3.49 × 10^24
b: 6.02 × 10^23
c: 1.03 × 10^23
d: 4.00 - (ANSWER)a
,2|Page
What is the value of n when the empirical formula is C3H5 and the molecular mass is 205.4
g/mol?
a: 10
b: 0.02
c: 140
d: 5 - (ANSWER)d
How many atoms are in 15.6 grams of silicon?
a: 0.555
b: 3.34 × 10^23
c: 2.64 × 10^26
d: 438 - (ANSWER)b
What is the correct value for Avogadro's number?
a: 6.022 × 10^2.3
b: 6.022 × 10^33
,3|Page
c: 6.022 × 10^23
d: 6.023 × 10^22 - (ANSWER)c
The empirical formula for C6H6 is C3H3.
True
False - (ANSWER)False
Water is 11.2% hydrogen by mass.
True
False - (ANSWER)True
One mole of CO2 gas contains 1 mole of carbon atoms and 2 moles of oxygen atoms.
True
False - (ANSWER)True
, 4|Page
Avogadro's Number is 6.022 × 1023.
True
False - (ANSWER)True
A 500. gram iron ore sample was determined to contain 242 grams of iron. What is the mass
percent of iron in the ore?
a: 32.6
b: 48.4
c: 51.6
d: 93.7 - (ANSWER)b
What is the mass of 0.560 moles of chlorine gas?
a: 19.9
b: 39.7
c: 127
d: 63.3 - (ANSWER)b
CHEM 101 FINAL IVY TECH EXAM | WITH COMPLETE
QUESTIONS AND ANSWERS | 2025/206 LATEST UPDATED | 100
% RATED AND VERIFIED SOLUTIONS | GET AN A+
What is the mass percent of hydrogen in water?
a: 5.60
b: 11.2
c: 33.3
d: 88.8 - (ANSWER)b
How many atoms are in 5.80 moles of He?
a: 3.49 × 10^24
b: 6.02 × 10^23
c: 1.03 × 10^23
d: 4.00 - (ANSWER)a
,2|Page
What is the value of n when the empirical formula is C3H5 and the molecular mass is 205.4
g/mol?
a: 10
b: 0.02
c: 140
d: 5 - (ANSWER)d
How many atoms are in 15.6 grams of silicon?
a: 0.555
b: 3.34 × 10^23
c: 2.64 × 10^26
d: 438 - (ANSWER)b
What is the correct value for Avogadro's number?
a: 6.022 × 10^2.3
b: 6.022 × 10^33
,3|Page
c: 6.022 × 10^23
d: 6.023 × 10^22 - (ANSWER)c
The empirical formula for C6H6 is C3H3.
True
False - (ANSWER)False
Water is 11.2% hydrogen by mass.
True
False - (ANSWER)True
One mole of CO2 gas contains 1 mole of carbon atoms and 2 moles of oxygen atoms.
True
False - (ANSWER)True
, 4|Page
Avogadro's Number is 6.022 × 1023.
True
False - (ANSWER)True
A 500. gram iron ore sample was determined to contain 242 grams of iron. What is the mass
percent of iron in the ore?
a: 32.6
b: 48.4
c: 51.6
d: 93.7 - (ANSWER)b
What is the mass of 0.560 moles of chlorine gas?
a: 19.9
b: 39.7
c: 127
d: 63.3 - (ANSWER)b
