EXAM 1 QUIZ SI CHEM 1335

All atoms of a given element have the same __________.

• mass

• number of neutrons

• number of electrons and neutrons

• number of protons

A 30.5 gram sample of glucose (C6H12O6) contains __________ mol of glucose.

• 2.36
  

• 5.90
  

• 0.169
  

• 0.136

Which pair of elements would you expect to exhibit the greatest similarity in their physical and
chemical properties?

• C, N

• O, S
  

• H, He
  

• K, Ca

Which of the following compounds would you expect to be ionic?

• SF6

• CaO
  

• NH3

• H2O2
  

Which one of the following molecular formulas is also an empirical formula?

• H2P4O6

• C6H6

• C2H6SO

• C6H6O2
  

The correct answer (reported to the proper number of significant figures) to the following is _______
6.3 × 3.25 = _____

• 20.5

• 20.

• 20.48
  

• 21
  

The correct name for MgF2 is __________

• magnesium fluoride

• manganese bifluoride

• magnesium difluoride

• monomagnesium difluoride

Identify HCl.

• strong electrolyte, weak acid

• weak electrolyte, strong acid

• strong electrolyte, strong acid

• weak electrolyte, weak acid

How many moles of Na+ are present in 343 mL of a 1.27 M solution of Na2SO4?

• 3.70

• 1.31
  

• 0.871
  

• 11.1

The combustion of propane (C3H8) produces CO2 and H2O:
C3H8 (g) + 5O2 (g) → 3CO2 (g) + 4H2O (g)
The reaction of 2.5 mol of O2 will produce ________ mol of H2O.

• 4.0

• 2.5

• 2.0

• 1.0