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CHEMISTRY CHAPTER 1

/in /by

Exercise 1.20: Review Questions

Part A

What is the standard SI base unit of length?

[removed]1 km

[removed]1 m

[removed]1 N

[removed]1 mm

[removed]1 hr

Part B

What is the standard SI base unit of mass?

[removed]1 in

[removed]1 m

[removed]1 kg

[removed]1 K

[removed]1 g

Part C

What is the standard SI base unit of time?

[removed]1 min

[removed]1 day

[removed]1 km

[removed]1 hr

[removed]1 s

Part D

What is the standard SI base unit of temperature?

[removed]1 K

[removed]1 s

[removed]1 ∘ F

[removed]1 kg

[removed]1 Å

Exercise 1.64: Problems by Topic – Density

A supposedly gold nugget is tested to determine its density. It is found to displace 19.3 mL of water and has a mass of 371 grams.

Part A

Could the nugget be made of gold?

[removed]yes

[removed]no

Exercise 1.71: Problems by Topic – The Reliability of a Measurement and Significant Figures

How many significant figures are in each of the following numbers?

Part A

0.0053 s

[removed]2

[removed]4

[removed]5

[removed]ambiguous

Part B

312,000 s

[removed]1

[removed]3

[removed]6

[removed]ambiguous

Part C

3.12×10 5 km

[removed]1

[removed]2

[removed]3

[removed]ambiguous

Part D

13,127 s

[removed]2

[removed]3

[removed]5

[removed]ambiguous

Part E

2000

[removed]1

[removed]2

[removed]4

[removed]ambiguous

Exercise 1.58: Problems by Topic – Units in Measurement

Express the quantity 255074 m in each of the following.

 

Part A

km

Express your answer using six significant figures.

255074 m = 

 

 

Part B

Mm

Express your answer using six significant figures.

255074 m = 

 

 

Part C

mm

Express your answer using six significant figures.

255074 m = 

 

 

Part D

cm

Express your answer using six significant figures.

255074 m = 

 

 

 

 
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