Significant Figures Worksheet No. 2
RULE -1: If the decimal is Present: Find the first non zero on the left, then count all digits to the RIGHT If the decimal is Absent: Find the first non zero on the right, then count all digits to the LEFT
RULE-2: Every digit in scientific notation is Significant
RULE-3: Any number that is counted is an EXACT number and has UNLIMITED significant digits.
How many significant figures do the following numbers have?
1) 1234 m ____
2) 0.023 L_____
3) 890 kg_____
4) 91010 m _____
6) 0.0001 kg_____
7) 9010.0 cm_____
8) 3.4 x 104 g_____
9) 9.0 x 10-3 cm_____
11) 8120 cats_____
12) 9.010 x 10-2 g____
13) 0.00030 hL_____
14) 1020010 mg_____
5) 918.010 L_____
10) 0.00390 kL_____
15) 7.991 x 10-10 g____
Rule for Multiplication & Division = Least number of Sig Figs
Rule for Addition & Subtraction = Least number of decimal places (highest value)
Perform the following calculations and round according to the rule above.
16) 334.54 grams + 198 grams = ____________
17) 34.1 grams / 1.1 mL = __________________
18) 2.11 x 103 joules / 34 seconds = __________
19) 0.0010 meters – 0.11 m = ______________
20) 349 cm + 1.10 cm + 100 cm = ______________
21) 450 meters / 114 seconds = ________________
22) 298.01 kilograms + 34.112 kilograms = _______
23) 84 m/s x 31.221 s = ___________________
Perform the following dimensional analysis problems. Make sure the final value has the proper number of significant figures. SHOW ALL CALCULATIONS! If you need more space, use the pages of your comp book.
24) 5,680meters ______ kilometers
25) 0.0567 kilograms _____grams
26) 2.50 grams _____ milligrams
27) 12.450 liters _____ centiliters
28) 4.25 x 1023 atoms ____ moles
29) 45.7 moles ____ molecules
30) 0.0650 L of helium gas ______moles
Name: ________________________ Date: _______________ Period: _____
Significant Figures Worksheet No. 2
RULE -1: If the decimal is Present: Find the first non zero on the left, then count all digits to the RIGHT If the decimal is Absent: Find the first non zero on the right, then count all digits to the LEFT
RULE-2: Every digit in scientific notation is Significant
RULE-3: Any number that is counted is an EXACT number and has UNLIMITED significant digits.
How many significant figures do the following numbers have?
1) 1234 m ____
2) 0.023 L_____
3)