Moles Quiz

A mole of hydrogen contains ______ a mole of oxygen?

• More molecules

• Fewer molecules

• The same number of molecules

• More energy

Which of the following is best suited to be counted by moles?

• Grains of sand in the ocean

• Spaces on a chessboard

• Slices of bread in a loaf

• Residents of a city

Avogadro's number is written in scientific notation. Which choice is also written in scientific notation?

• 5 x 4

• 7 x 10^5

• 0.00001

• Ten trillion

Two closed containers at the same temperature and pressure contain different numbers of gas molecules. What is the most logical conclusion?

• One container must be cracked

• One container is bigger than the other

• The containers must contain different types of gas

• One container must contain liquid and solid matter as well as gas

What was the biggest limitation that prevented Amedeo Avogadro from coming up with the concept of the mole?

• Lack of money

• Lack of discipline

• Lack of interest

• Lack of knowledge

Calculating Avogadro's number would have been impossible without the discovery of a method to calculate:

• Every element's atomic number

• The number of electrons found in every element

• Every element's atomic structure

• Every element's atomic mass

The mass of one sodium atom is about 22.99 ______. What unit should go in the blank?

• u

• g

• mg

• kg

Tags

NGSS.HS-PS1-7

Which sentence best describes the relationship between the mole and Avogadro's number?

• They were named after the same scientist

• They were defined in the same year

• Avogadro's number gives the mole a numerical value

• A mole is a specific type of Avogadro's number

What is the atomic mass of element X if a 30,000 milligram sample of element X contains 1 mole of element X atoms?

• 33

• 30 u

• 13 u

• 3 u

Tags

NGSS.HS-PS1-7

You're trying to combine two elements into 10 grams of a new substance, and all you're given is the chemical formula of the substance. What information should you look up?

• The temperature in the room

• The pressure in the room

• The atomic number of each element

• The atomic mass of each element