Chem Basics Review

You are heating a substance in a test tube. Always point the open end of the test tube ________.

• Toward yourself.

• Toward your lab partner.

• Toward another classmate.

• Away from all people.

Personal eyeglasses provide as much protection as ________.

• A face shield.

• Safety goggles/glasses.

• Splash proof chemical goggles.

• None of these.

The following footwear is required in the lab ________.

• Sandals.

• Open-toe shoes.

• Closed-toe shoes.

• Shoes appropriate for the weather.

True or False:

IF acid splashes on your skin you should rinse ONLY with lots of water, no soap.

• True

• False

True or False:

Chipped or cracked glassware is ok to use.

• True

• False

You are required to wear goggles when ________.

• chemicals are used.

• heated glass is used.

• working with fire.

• chemicals, heated glass, or fire are being used.

( Fill in the blank) Long hair should be ____________ in the laboratory.

• tied back

• cut

• down

• curled

(True or False) Horse playing is allowed in the laboratory

• true

• false

How many sig. fig. are in the number below:
350.540

• 4
• 5
• 6
• 7

Which measurement contains 3 sig figs?

• 200 mL
• 20.0 mL
• 0.02 mL
• 0.020mL