where the numbers 2 and 3 in the last term are exact 1.67 Carry out each calculation, paying special attention to sig- nificant figures, rounding, and units:
where the numbers 2 and 3 in the last term are exact 1.67 Carry out each calculation, paying special attention to sig- nificant figures, rounding, and units:
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:1.64 Convert the following into correct scientific notation:
(a) 802.5x102; (b) 1009.8×10-6; (c) 0.077x10-9.
1.65 Convert the following into correct scientific notation:
(a) 14.3x10'; (b) 851×10-2; (c) 7500x10-3.
1.66 Carry out each calculation, paying special attention to sig-
nificant figures, rounding, and units (J = joule, the SI unit of en-
mol = mole, the SI unit for amount of substance):
(6.626x10-34 J •s)(2.9979×10° m/s)
(a)
ergy;
489x10- m
(6.022x1023 molecules/mol) (1.23x10° g)
46.07 g/mol
(b)
(c) (6.022x102 atoms/mol)(1.28x10-18 J/atom)
22
where the numbers 2 and 3 in the last term are exact
1.67 Carry out each calculation, paying special attention to sig-
nificant figures, rounding, and units:
4.32x10 g
(a)
(The term is exact.)
(3.1416)(1.95x10² cm)³
(1.84x10 g)(44.7 m/s)²
(b)
(The term 2 is exact.)
(1.07x10 mol/L)°(3.8x10-³ mol/L)
(c)
(8.35x10-5 mol/L)(1.48×10-² mol/L)³
1.68 Which statements include exact numbers?
(a) Angel Falls is 3212 ft high.
(b) There are 8 known planets in the Solar System.
(c) There are 453.59 g in 1 lb.
(d) There are 1000 mm in 1 m.
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