Word Problems using Sig Figs Word Problems using

Word Problems using Sig. Figs.

Word Problems using Sig. Figs. Ex. (1) Find the average of the following lengths: 23. 8 cm, 23. 7 cm, 23. 8 cm, 22. 9 cm, 23. 1 cm, 23. 3 cm, and 23. 0 cm. [when averaging data, use the addition/subtraction rule. ] 23. 8 cm 23. 7 cm 23. 8 cm 22. 9 cm 23. 1 cm 23. 3 cm + 23. 0 cm 163. 6 cm true number 163. 6 cm 7 = 23. 37142857 cm 23. 4 cm

Word Problems using Sig. Figs. Ex. (2) What is the volume of a solid block that is 2. 7 cm long, 1. 6 cm wide, and 6. 3 cm high? V=L W H V = 2. 7 cm 1. 6 cm 6. 3 cm V = 27. 216 cm 3 V = 27 cm 3

Word Problems using Sig. Figs. Ex. (3) What is the density of the solid block in question #2 if its mass is 72. 906 g? d = m V d = 72. 906 g 27 cm 3 d = 2. 700222222 g/cm 3 d = 2. 7 g/cm 3

Word Problems using Sig. Figs. Ex. (4) What is the volume of a solid cylinder that has a radius of 1. 46 cm and a height of 7. 41 cm? (V = r 2 h, use 3. 14 for ) V = r 2 h V = 3. 14(1. 46 cm)2(7. 41 cm) V = 49. 59678984 cm 3 V = 49. 6 cm 3

Word Problems using Sig. Figs. Ex. (5) What is the density of the solid cylinder in question #4 if its mass is 111. 649 g? d = m V d = 111. 649 g 49. 6 cm 3 d = 2. 250987903 g/cm 3 d = 2. 25 g/cm 3

Word Problems using Sig. Figs. Ex. (6) If a beaker and a marble have a mass of 120. 637 g and the beaker has a mass of 110. 427 g, then what is the mass of the marble? m = 120. 637 g – 110. 427 g m = 10. 210 g

Word Problems using Sig. Figs. Ex. (7) What would be the mass, in grams, of a solid sample of gold if it were the same size and shape as a standard size basketball which has an official volume of 2250 cm 3? d = m V 19. 3 g/cm 3 = X 2250 cm 3 1 X = 43425 g X = 43400 g

Word Problems using Sig. Figs. Ex. (8) What would be the mass, in lbs, of the gold sample from question 7? [1. 00 lb = 454 g] X 43400 g ______ = ______ Cross multiply and then divide 1. 00 lb 454 g X = 95. 81497797 lbs X = 95. 6 lbs