Moles Review

Calculate the molar mass of Ba(C₂H₃O₂)₂

• 255.3 g/mol

• 237.3 g/mol

• 228.3 g/mol

• 196.3 g/mol

What is Avogadro's Number?

• 6.0 x10^23

• 6.0x10^24

• 1023 x 10^6

• 8675309

Calculate the Molar Mass for CaCl

• 75.53 mol/g

• 75.53 g/mol

• 35.45 g/mol

• 40.08 g/mol

You have 2 moles of graphite (KC₈) in your pencil. How many grams of graphite are in your pencil?

• 135.19 g

• 270.37 g

• 67.59 g

• 134 g

How many moles of Francium (Fr) are in 7.4 x 10²⁶ atoms?

• 1.23 moles

• 44.56 x 10⁴⁹ moles

• 87 moles

• 1.23 x 10³ moles Fr

How many molecules are present in 25 g of NaBr?

• 102.96 molecules
• 0.24 molecules
• 1.45x10²³ molecules
• 2.34 x 10²⁰molecules

What units are used for MOLAR MASS?

• g

• mol

• g/mol

• kg/mg

Tags

NGSS.HS-PS1-7

Match the number of sig figs for each number:

• 1

• 4.77x10^9

• 6

• 91066

• 4

• 0.007020

• 5

• 600

• 3

• 4300.00

Convert 4.19x10^-4 to standard notation:

• 41900

• 4.19

• 0.000419

• 0.419

Convert 3,529,000 to scientific notation with 2 sig figs:

Mathematical Equivalence

ON