MOLE ONCEPT

What is Avogadro's Number?

• 6.022 x 10²³

• 6 x 10³

• 600

• 1 mole

What is a mole in chemistry terms?

• a mammal found in Eurasia
• an SI unit for measuring the amount of a substance
• a benign tumor sometimes found on human skin appearing as a small, sometimes raised area of skin, usually with darker pigment
• a Mexican sauce made from chili peppers, other spices, and chocolate

Zachary is tasked with carefully measuring precisely one mole of aluminum. What exactly would Zachary be getting?

• He should obtain 27 aluminum pellets

• He should obtain 27 grams of aluminum

• He should obtain 13 grams of aluminum

• He should obtain 27 atoms of aluminum

How many moles of CO₂ are there in 22 grams?

• 6.022e23 particles

• 2 mole

• 0.50 mole

• 0.5 mole

How many moles are there in 4 g of oxygen atoms ?

• 15.999 g

• 4 moles

• 0.3 moles

• 0.3 g

What is the molar mass of CO₂?

• 44.01 g/mol
• 56.02 g/mol
• 58.93 g/mol
• 117.06 g/mol

How many molecules are in 2.5 mol of NaCl?

• 1.51x10²³

• 146

• 4.15

• 1.51x10²⁴

How many molecules are in 2.5 mol of NaCl?

• 1.51x10²³

• 146

• 4.15

• 1.51x10²⁴