Moles Concept Check

What is the mass of 6.02 x 10²³ platinum atoms? Round to the nearest hundredths place.

• 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

We use the periodic table to calculate...

• mass
• molar mass
• moles

Tags

NGSS.HS-PS1-7

What is the molar mass of one molecule of Nitrogen N₂?

• 14.01 amu
• 14.01 g
• 28.02 g
• 28.02 amu

Tags

NGSS.HS-PS1-1

What is the percent by mass of magnesium in MgO?

• 20%
• 40%
• 50%
• 60%

How many grams are in 1.2 x 10²⁴ molecules of CO? (molar mass of CO = 28 g/mol)

• 28.2 g

• 55.8 g

• 6.02 g

• 1.2 g

Tags

NGSS.HS-PS1-7

Find the Molar Mass of:
Ga₂(SO₃)₃

• 280 g/mol
• 400 g/mol
• 380 g/mol
• 480 g/mol

What is the volume of 5 moles of oxygen gas?

• 112 L

• 22.4 L

• 120 L

• 24 L

Avogadro's number of representative particles is equal to one_____.

• kilogram
• gram
• kelvin
• mole

Which volume will be occupied by a gas containing 6.02 x 10²³ atoms of He?

• 1.0 L

• 24 L

• 22.4 L

• 44.8 L