Ch. 9 Stoichiometry

Avogadro’s number is:

• 6.02 x 10²²

• 6

• 6.02 x 10²³

• 3.01 x 10²³

Tags

NGSS.HS-PS1-7

Determine the number of moles in 5.2 x 10²² atoms of gold.

• 0.086 mole

• 0.52 mole

• 8.63 x 10⁴⁴ moles

• 3.1 x 10⁴⁶ moles

How many water molecules are in 5.2 moles of water?

• 6.0 x 10²³ molecules

• 5.2 molecules

• 3.1 x 10²⁴ molecules

• 8.6 x 10^-24 molecules

How many moles of methane (CH₄) are in 1.24 x 10²³ molecules of methane?

• 6.02 x 10²³ moles

• 7.46 x 10⁴⁶ moles

• 978 moles

• 0.206 moles

The mass of one mole of substance is called...

• molecular mass

• mole constant

• molar mass

• atomic weight

What is the molar mass of Ca(NO₃)₂?

• 148.096 g

• 164.086 g

• 102.055 g

• 70.084 g

What is the molar mass of carbon dioxide?

• 12.40 g/mol

• 16.55 g/mol

• 32.21 g/mol

• 44.01 g/mol

How many moles are in 74 g of KCl

• 0.99 mole

• 0.014 mole

• 11 moles

• 0.14 mole

Determine how many grams are in 0.36 moles of CCl₄.

• 150 g

• 55 g

• 0.0023 g

• 2.2 g

How many atoms would be contained in 454 grams of iron?

• 6.02 x 10²³ atoms

• 8.14 atoms

• 4.89 x 10²⁴ atoms

• 55.9 x 10²³ atoms