Significant Figures
Quiz
•
Chemistry, Mathematics
•
10th - 12th Grade
•
Practice Problem
•
Medium
Raheem Spence
Used 17+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many significant figures: 20 pencils.
2
1
unlimited
3
Answer explanation
A number that is counted has an unlimited number of significant figures.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many significant figures: 1300 cm.
5
2
4
Answer explanation
Zeros at the rightmost end of a measurement that lie to the left of an understood decimal point are not significant if they serve as placeholders to show the magnitude of the number.
So only 2 here, the non-zero digits are counted.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many significant figures: 0.0042 grams
4
5
2
Answer explanation
Leftmost zeros appearing in front of nonzero digits are not significant.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many significant figures: 358.2 ml.
4
5
unlimited
Answer explanation
Every nonzero digit is assumed to be significant.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many significant figures: 2.00 meters.
2
3
unlimited
Answer explanation
Zeros at the end of a number and to the right of a decimal point are always significant.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many significant figures: 145000 cm.
2
3
6
Answer explanation
Zeros at the rightmost end of a measurement that lie to the left of an understood decimal point are not significant if they serve as placeholders to show the magnitude of the number.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many significant figures: 0.005003 L.
2
7
4
Answer explanation
Two things here:
1) leftmost zeros appearing in front of nonzero digits are not significant.
2) Sandwhiched zeros between nonzero digits are significant.
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