Chemistry Final Exam review

A student is heating an aqueous solution in a test tube during an experiment. The test tube explodes, sending the hot aqueous solution into the student's face. Despite safety goggles, she could feel the solution running into her eyes. Which laboratory safety item should the student use?

• Safety shower

• Eye wash

• Fire extinguisher

• Fire blanket

During an experiment, a reagent bottle is accidentally spilled on the laboratory floor. What is the first step a student should take?

• Clean it up with paper towels

• Cover the spill with an absorptive material, such as kitty litter

• Evacuate the lab

• Alert the teacher

The molar mass of an element is equal to its...

• Atomic mass

• Atomic number

• Valence electrons

• Oxidation number

Tags

NGSS.HS-PS1-7

Which would have more atoms?

• 1 mole of Li

• 1 mole of Cu

• 1 mole of Ag

• None, all are equal

What are the units for molar mass?

• grams

• grams/mole

• mole

• liters

What is the formula mass of potassium chloride, KCl?

• 32.3 g/mol

• 74.1 g/mol

• 149.2 g/mol

• 154.5 g/mol

What is a mole in chemistry terms?

• a mammal found in Eurasia and North America

• 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

Tags

NGSS.HS-PS1-7

What is the molar mass of KBr?​ (a)  

• 119 g/mol
• 85 g/mol
• 150 g/mol
• 54 g/mol

How many Carbon atoms are present in 1.00 mole of methane, CH4?​ (a)  

• 6.02 X 10^23
• 5.00 X 10^23
• 1.00 X 10^23
• 3.01 X 10^25

What is the empirical formula for glucose, C6H12O6?

• CH2O

• C2H4O2

• C3H6O3

• C6H12O6