Significant Figures. All non-zero digits are significant . 3971874351298 (13 sig. fig.) Zeros which start a number are never significant . 0.35 (2 sig. fig) .0000587 (3 sig. fig) Zeros which are between other significant figures are significant . 2348762074003 (13 sf ).
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1. 368721
2. 0.453
3. 6704000
4. 60
5. 5700.
Significant Figures, Scientific Notation, Unit Conversion, and Unit Magnitudes
The final answer here is 272
The final answer is 2
-5.67 x 105
coefficientbaseexponent
1. The coefficient must be greater than or equal to 1 and less than 10.
2. The base must be 10.
3. The exponent must show the number of decimal places that the decimal needs to be moved to change the number to standard notation. A negative exponent means that the decimal is moved to the left when changing to standard notation.
EXE
EXP
EXP
ENTER
EE
EE
(5.44 × 107 g) ÷ (8.1 × 104 mol) =
Type on your calculator:
5.44
7
8.1
4
÷
= 671.6049383
= 670 g/mol
= 6.7 × 102 g/mol
(exactly 1 lb = 454 g )
ANS: 7.925 lbs
(1 ounce = 28.349523 grams)
ANS:8.15 ounces
(1 qt = 0.946 L and 4qt = 1 gal)
ANS: 1.50
1. Identify starting & ending units.
2. Line up conversion factors so units cancel.
3. Multiply all top numbers & divide by each bottom number.
4. Check units & answer.
How many seconds are in 1.4 days?
Plan: days hr min seconds
1.4 days x 24 hr x 60 min x 60 sec =
1 day1 hr 1 min
120960 sec
120000 sec