Mole Concept Practice

What do you always start your conversion table with?

• The molar mass

• 1 mol = molar mass

• The given

What units are used for molar mass?

• mol

• grams (g)

• grams per mole (g/mol)

• Molecules

Tags

NGSS.HS-PS1-7

Which of the following DOES NOT use the conversion 1 mol = 6.02 x 10^{23}

• moles to grams

• moles to molecules

• moles to atoms

• moles to formula units

When do you need to calculate molar mass?

• Every time

• Given the chemical formula

• Given Moles and Molecules

• Given Moles and Grams

Which of the following statements regarding the mole is incorrect?

• A mole is a counting unit equal to 6.02 x 10²³ atoms.

• The number of atoms in a mole is known as Avogadro’s number.

• A mole of atom of an element is numerically equal to the atomic mass of the element.

• all other statements are true

What is the mass of 6.02 x 10²³ platinum atoms?

• 30.97 g

• 106.42 g

• 140.91 g

• 195.09 g

If one Monster energy drink contains 0.16 g of caffeine, how many moles of caffeine do we consume when we drink 1 can? The chemical formula for caffeine is C₈H₁₀N₄O₂.

• 194.19 moles

• 1.07 moles

• 0.00082 moles

• 1213.69 moles

Tags

NGSS.HS-PS1-7

Mylanta, a common antacid, contains magnesium hydroxide, Mg(OH)₂. How many moles of magnesium hydroxide are in 75.0 g of magnesium hydroxide?

• 0.551 moles

• 0.778 moles

• 1.29 moles

• 1.82 moles

Chalk is mostly made of calcium carbonate, CaCO₃. If it took 48.6 g of chalk to write your name on the sidewalk, how many moles of calcium carbonate does your name contain?

• 0.486 mol

• 0.714 mol

• 1.40 mol

• 2.06 mol

Tags

NGSS.HS-PS1-7

A scientists analyzed an unknown sample and determined that it contained 5 moles of oxygen and 2 moles of nitrogen? Which of the following would be its molecular formula?

• N₂O₅

• N₄O

• NO

• O₂N₅

Tags

NGSS.HS-PS1-7