Moles Empirical Formulas Percent Composition

What is the molar mass of AuCl₃?

• 96 g
• 130 g
• 232.5 g
• 303.3 g

How many particles are in a mole?

• 602
• 602 million
• 602 moles
• 6.02 x 10²³

Which of the following would have more mass?

• 1 mole of Li
• 1 mole of Au
• 1 mole of Si
• None, all are equal

Determine the amount of moles in 1.50 x 10²³ atoms of fluorine.

• 9.03 x 10⁴⁶ moles
• 0.249 moles
• 4.73 moles
• 0.0131 moles

Tags

NGSS.HS-PS1-7

Determine the number of atoms in 2.50 moles of zinc.

• 1.51 x 10²⁴ atoms
• 4.15 x 10^-24 atoms
• 2.71 x 10^-22 atoms
• 163 atoms

Tags

NGSS.MS-PS1-1

What is the molar mass of MgCl₂?

• 24.31 g/ml
• 95.21 g/mol
• 59.76 g/mol
• 70.90 g/mol

Determine the mass of 4.20 moles of C₆H₁₂ (Molar mass = 84.2 g/mole)

• 354 g

• 84 g

• 337 g

• 421 g

How many particles are in 13.5 grams of Beryllium?

• 1.5 particles
• 9 particles
• 4x10²³ particles
• 9x10²³ particles

Tags

NGSS.HS-PS1-7

Calculate the % composition by mass of oxygen present in H₂SO₄.

• 16.3%
• 65.25%
• 32.6%
• 57.14%

What is the percent by mass of sodium in NaCl?

• 39%
• 61%
• 35%
• 65%