Unit 5 - PS Prep Formative 05082024

How many atoms of calcium are found in 1 mole of calcium?

• 1 atom
• 40.078 atoms
• 6.022 atoms
• 6.022 x 10²³ atoms

What is the mass of 1 mole of calcium atoms?

• 1 g
• 40.078 g
• 6.022 g
• 6.022 x 10²³ g

1 mole of calcium atoms would have the same number of atoms as...

• 0.25 mole of Sb
• 0.5 mole of Br
• 1 mole of Mg
• 2 mole of Ne

9.012 grams of Beryllium atoms would have the same number of atoms as 20.180 grams of neon. What mass of hydrogen atoms would have the same number of atoms as 4.003 grams of He atoms?

• 1.008 g
• 4.003 g
• 5.011 g
• 6.941 g

Shown above is the molecule for tetragermanium decahydride. What is the molecular formula for tetragermanium decahydride?

• GeH
• Ge₂H₅
• Ge₄H₁₀
• Ge₁₀H₁₀

What is the empirical formula for tetragermanium decahydride?

• GeH
• Ge₂H₅
• Ge₄H₁₀
• Ge₁₀H₁₀

In a chemistry experiment, a student determine the moles of aluminum and fluorine in a compound they sythesized (made). What is the simplified integer ratio of the moles of F / moles of Al synthesized?

• 1 mole of Al / 3 mole of F
• 3 mole of Al / 1 mole of F
• 1 mole of Al /1 mole of F
• 6 mole of Al / 9 mole of F

What is the empirical formula of the aluminum fluoride compound synthesized in this experiment?

• AlF
• AlF₃
• Al₃F
• Al₃F₉

A mole of carbon dioxide contains 6.02 x 10²³ _____.

• atoms
• formula units
• ions
• molecules

The mass of substance containing the same number of fundamental units as there are atoms in exactly 12.01 g of Carbon.

• mole
• molar volume
• Avogadro's number
• Law of Conservation of Mass