Question

General Chemistry I Laboratory. Fall 2015 Dr. Karan What is the number of significant figures in each of the following measured Quantities? 2300 g 10.005 m 7.60 mL 5 6 times 10^3 kg 7500. L Perform the following conversion: 90.8 mg to g 0.0088 cm to nm 320 pg to g 34 5 degree C to degree F Explain the difference between precision and accuracy for measured quantities. Why is it necessary to calibrate a thermometer and a graduated cylinder?

Answer 1

1.

a. 2300 g significant figure 2

b 10.005 m    significant figure 5

c 7.60 mL   significant figure 3

d 5.6 x 10³ significant figure 2

e 7500 L  significant figure 2

2.

a. 90.8 mg divide with 1000

90.8/1000 = 0.0908 g

b

1 cm = 10⁷ nm

0.0088 cm = 88000 nm

c

1 micro gram = 10^-6 grams

320 micro gram = 0.00032 gram

d

34.5 ºC = 94.1 ºF