The Mole Chemistry

How many grams are in 7.80 moles of NaCl?

• 476 grams

• 460. grams

• 452 grams

• 462 grams

How many grams are in 3.30 mol of potassium sulfide?

• 363 g

• 454 g

• 238 g

• 132 g

Tags

NGSS.HS-PS1-7

How many atoms of iodine are in a mole of iodine?

• 53

• 63.55g

• 126.9

• 6.02 x 10²³

How many octane molecules would be in 8.4 moles of octane (C₈H₁₈)?

• 5.77 x 10²³

• 5.06 x 10²⁴

• 5.77 x 10²⁶

• 5.06 x 10²³

How many molecules are present in 25.0 g of NaBr?

• 103 molecules

• 0.240 molecules

• 1.46x10²³ molecules

• 2.34 x 10²⁰ molecules

5.11x10²³ atoms of lithium is equal to how many moles?

• 18

• 0.351

• 1.34

• 0.849

True or False. You must convert grams to moles to do stoichiometry.

• True

• False

Tags

NGSS.HS-PS1-7

How many atoms are in a mole?

• 6.022x10^23

• 1

• Molar Mass

• 22.4

What is the molar volume of an ideal gas at STP?

• 1 mol = 22.4 L

• 1 mol = 0.0821 L

• 1 mol = 1 L

• 1 mol = 273 L

Which of the following statements regarding the mole is INCORRECT?

• A mole is a unit of quantity equal to 6.02 x 10²³ particles.

• The number of particles in a mole is known as Avogadro’s number.

• A mole of particles of an element is numerically equal to the atomic mass of the element.

• none of the above