H. Unit 0 - TEST - Science skills in Chemistry

How many significant figures: 153.0 mL

• 1
• 2
• 3
• 4

How many significant figures: 0.012 km

• 1
• 2
• 3
• 4

How many significant figures: 1000 mL

• 1
• 2
• 3
• 4

Round 0.010229 to four sig figs

• 1022
• 1023
• 0.01023
• 0.01022

15.6 L = ___________ mL

• 15,600
• 156,000
• 1,560,000
• 15,600,000

A pure substance...

• is an element or a compound
• is an element or a mixture
• is a compound or a mixture
• is a mixture

NaHCO₃ is an example of —

• an abbreviation

• a compound

• a mixture

• an element

Which of these substances is an example of a solution?

• crunchy peanut butter

• sweet tea
• mercury (Hg)

• concrete

A substance made of only one type of atom is called —

• an element
• a mixture
• a compound
• a salt

True or False:

Return all unused chemicals to their original containers.

• True

• False