Concept explainers
(a)
Interpretation:
The number of significant digits in
Concept introduction:
All non-zero digits are significant digits. The significant digits are taken by counting the digits from left to right and starting from the first non zero digit. There are two rules that describes the counting of significant digits,
(1) Count the significant digits starting with the first non-zero digit.
(2) In significant digits placeholder zero will not be counted.
(b)
Interpretation:
The number of significant digits in
Concept introduction:
All non-zero digits are significant digits. The significant digits are taken by counting the digits from left to right and starting from the first non zero digit. There are two rules that describes the counting of significant digits,
(1) Count the significant digits starting with the first non-zero digit.
(2) In significant digits placeholder zero will not be counted.
(c)
Interpretation:
The number of significant digits in
Concept introduction:
All non-zero digits are significant digits. The significant digits are taken by counting the digits from left to right and starting from the first non zero digit. There are two rules that describes the counting of significant digits,
(1) Count the significant digits starting with the first non-zero digit.
(2) In significant digits placeholder zero will not be counted.
(d)
Interpretation:
The number of significant digits of
Concept introduction:
All non-zero digits are significant digits. The significant digits are taken by counting the digits from left to right and starting from the first non zero digit. There are two rules that describes the counting of significant digits,
(1) Count the significant digits starting with the first non-zero digit.
(2) In significant digits placeholder zero will not be counted.
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Introductory Chemistry: Concepts and Critical Thinking (8th Edition)
- Perform the following calculations and report each answer with the correct number of significant figures.(a) 62.8 × 34(b) 0.147 + 0.0066 + 0.012(c) 38 × 95 × 1.792(d) 15 – 0.15 – 0.6155(e) 8.78 × ((0.0500)/(0.478))(f) 140 + 7.68 + 0.014(g) 28.7 – 0.0483(h) ((88.5 − 87.57)/(45.13))arrow_forwardGive the name and symbol of the prefixes used with SI units to indicate multiplication by the following exact quantities.(a) 103(b) 10−2(c) 0.1(d) 10−3(e) 1,000,000(f) 0.000001arrow_forwardRound off each of the following numbers to two significant figures:(a) 0.436(b) 9.000(c) 27.2(d) 135(e) 1.497 × 10−3(f) 0.445arrow_forward
- How many significant figures are there in each number below? (a) 1.903 0 (b) 0.039 10 (c) 1.40 X 104arrow_forwardHow many significant figures are there in each of the following? (a) 61.8 ± 0.1 (b) 3.407 x 10⁹ (c) 2.0400 x 10-6 (d) 0.0040 Need Help? Read Itarrow_forwardWhich of the following include exact numbers?(a) The speed of light in a vacuum is a physical constant; to six significant figures, it is 2.99792×108 m/s.(b) The density of mercury at 25°C is 13.53 g/mL.(c) There are 3600 s in 1 h.(d) In 2010, the United States had 50 states.arrow_forward
- Which of the following include exact numbers?(a) The speed of light in a vacuum is a physical constant; to six significant figures, it is 2.99792X10⁸m/s.(b) The density of mercury at 25°C is 13.53 g/mL.(c) There are 3600 s in 1 h.(d) In 2003, the United States had 50 states.arrow_forwardCalculate each of the following expressions, giving youranswers the proper numbers of significant figures.(a) log (3.56 × 104)(b) e-15.69(c) 108.41(d) ln (6.893 × 10-22)arrow_forwardConvert the following quantities into SI units with the correct number of significant figures. (a) 5.4 in (b) 66.31 lb (c) 0.5521 gal (d) 65 mi/harrow_forward
- Write the following numbers in standard notation. Use a ter-minal decimal point when needed:(a) 6.500*10^3(b) 3.46*10^5(c) 7.5*10^2(d) 1.8856*10^2arrow_forwardHow many significant figures are there in each of the following?(a) 81.0 ± 0.8 (b) 3.827 ✕ 109 (c) 2.94 ✕ 10−6 (d) 0.0015arrow_forward(a) How many picometers are there in 1 m? (b) Express6.0 * 103 m using a prefix to replace the power of ten.(c) Use exponential notation to express 4.22 mg in grams.(d) Use decimal notation to express 4.22 mg in grams.arrow_forward
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