mole & Empirical

Which substance has the greatest molecular mass?

• H₂O₂
• NO
• CF₄
• I₂

What is the number of moles of 112 liter chlorine gas at STP?

• 3 mol
• 4 mol
• 5 mol
• 6 mol

What is the mass of 0.2 mol of Al? (Al:27g/mol)

• 27 g

• 54 g

• 5.4 g

• 2.7 g

How many moles are in 225 g of CO?

• 28.01 mole

• 4.82 x 10²⁴ mole

• 0.124 mole

• 8.03 mole

Find the molar mass of C₈H₁₈.

• 114 g/mol
• 26 g/mol
• 66 g/mol
• 338 g/mol

How many grams are in 7.8 moles of NaCl?

• 476grams
• 460 grams
• 452 grams
• 462 grams

Tags

NGSS.HS-PS1-7

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

• 4.013 moles

• 0.249 moles

• 4.73 moles

• 0.0131 moles

Determine the number of atoms in 1.50 g of carbon.

• 0.125 atoms
• 7.52 x 10²² atoms
• 1.08 x 10²⁵ atoms
• 2.07 x 10^-25 atoms

What is the mass of Na atom that contains 12.04 X 10²³ atoms in its structure? (Na:23g/mol)

• 11.5 g

• 23 g

• 34.5 g

• 46 g

An empirical formula:

• is a formula that calculates the coefficients of a compound in a balanced equation.
• is the simplest whole-number ratio of moles of elements in the compound.