CHEM 101 FINAL IVY TECH EXAM | WITH COMPLETE QUESTIONS AND ANSWERS | 2025/206 LATEST UPDATED | 100 % RATED AND VERIFIED SOLUTIONS | GET AN A+

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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

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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

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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

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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