- Lesson 3 -Part 3
Science
2 plays
5 questions
Question 1
Multiple Choice
10 points
Ethanol (C2H5OH), a domestically produced fuel source, is often blended with gasoline. A sample of ethanol has a mass of 45.6 g. A-How many carbon atoms does the sample contain?
A.2.78 X10^24 C atoms
B.1.19X10^24 C atoms
C.8.96X10^28 C atoms
D.1.19X10^2 C atoms
Question 2
Multiple Choice
10 points
Ethanol (C2H5OH), a domestically produced fuel source, is often blended with gasoline. A sample of ethanol has a mass of 45.6 g. B-How many hydrogen atoms are present?
A.4.89 X10^30 H atoms
B.3.58X10^24 H atoms
C.1.89X10^29 H atoms
D.1.018X10^11 H atoms
Question 3
Multiple Choice
10 points
Ethanol (C2H5OH), a domestically produced fuel source, is often blended with gasoline. A sample of ethanol has a mass of 45.6 g. C-How many oxygen atoms are present
A.9.56 X10^11 Oxygen atoms
B.5.96 X10^23 Oxygen atoms
C.5.96 X10^24 Oxygen atoms
D.9.78 X10^3 Oxygen atoms
Question 4
Multiple Choice
10 points
sample of sodium sulfite (Na2SO3) has a mass of 2.25 g. A-How many Na+ ions are present?
A.1.01X10^21 Na+ ions
B.3.09 X10^21 Na+ ions
C.2.16X10^22 Na+ ions
D.7.61X10^14 Na+ ions
Question 5
Multiple Choice
10 points
sample of sodium sulfite (Na2SO3) has a mass of 2.25 g. B-What is the mass in grams of one formula unit of Na2SO3?
A.2.09X10^-22 g Na2SO3 / formula unit
B.2.09X10^22 g Na2SO3 / formula unit
C.4.07X10^12 g Na2SO3 / formula unit
D.9.5X10^18 g Na2SO3 / formula unit