Week 1 Chemistry Basics

You accidentally spill a small amount of hydrochloric acid on your hand during a lab. What is the correct first step you should take?

• Wipe it off with a paper towel

• Rinse your hand immediately with plenty of water

• Tell your friend to get the teacher while you keep working

• Neutralize it with baking soda before rinsing

Which piece of lab equipment would you use to most accurately measure 7.25 mL of a liquid?

• Beaker

• Erlenmeyer flask

• Graduated cylinder

• Test tube

You’re stirring a solution on a hot plate, but you need to prevent splashing while heating. What equipment should cover the container?

• Watch glass

• Crucible

• Buret

• Volumetric flask

• micro-

• milli-

• nano-

• pico-

A sample of gold has a mass of 0.250 kilograms. What is this mass in grams?

• 2.5 grams

• 25 grams

• 250 grams

• 2500 grams

Convert 5.00 kilometers to centimeters.

• 340,000,000

• 34,000,000

• 3,400,000

• 3,400,000,000

Which of the following numbers has 4 significant figures?

• 0.00450

• 0.0450

• 4.500

• 4500

How many significant figures are in the measurement 0.0006020 g?

• 3

• 4

• 5

• 6

Which step of the scientific method involves making a prediction that can be tested?

• Observation

• Hypothesis

• Experiment

• Conclusion