Chem Unit 8 Review

Name

Class Period

• 3
• 7
• 8
• 5

The mass of one _________ is the molar mass of the element.

• mole of the element
• picogram of the element
• milliliter of the element
• representative particle of the element

Calculate the number of molecules present in 1.65 moles of H2O.

• 9.9 x10 ^23 Molecules
• 96.4 x10 ^24 Molecules
• 5.7 x10 ^23 Molecules
• 1.9 x10 ^23 Molecules

The sum of the atomic masses of all the atoms in a formula for a covalent compound is the

• real mass
• formula mass
• Avogadro's mass
• molecular mass

How many grams of MgCl2 are present in 11.32 moles?

• 1315.7 g
• 976.7 g
• 1184.4 g
• 1077.8 g

What is the molar mass of NaOH ?

• 37.0 g/mol
• 65.0 g/mol
• 40.0 g/mol
• 28.0 g/mol

What is the molar mass of sodium chloride, NaCl?

• 53.02 g/mol
• 58.44 g/mol
• 102.8 g/mol
• 112.5 g/mol

Zachary is tasked with carefully measuring precisely one mole of cobalt. How should Zachary go about completing this assignment?

• He should obtain 59 grams of cobalt.
• He should obtain 59 atoms of cobalt.
• He should obtain 59 cobalt pellets
• He should obtain 39 grams of cobalt.

What is a mole in chemistry terms?

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