Mole/Empirical Formula Problems Question Preview (ID: 59239)


Reviewing Moles And How To Find Empirical Formula, Including The Formula Of Hydrates. TEACHERS: click here for quick copy question ID numbers.

A solution with 200 mL of 3.00 M CuCl2 contains how many moles of CuCl2?
a) .600 moles
b) 600 moles
c) .667 moles
d) 667 moles

A sample of anhydrous NaCl has a mass of of 29.22 g/mol. The water (H2O) that was removed had a mass of 36.05 g/mol. What was the Hydrates formula?
a) 1 NaCl * 4 H2O
b) 4 NaCl * 1 H2O
c) 6 NaCl * 1 H2o
d) 2 NaCl * 8 H2O

NH4Cl would have a molar mass of...
a) 97 g/mol
b) 53.4 g/mol
c) 53.4 amu
d) 97 amu

A substance that is 92.3% C and 7.7% H would have an empirical formula of...
a) C1H1
b) C2H2
c) C3H3
d) C4H4

Which is the empirical formula?
a) P2O5
b) P8020
c) P6O15
d) P4O10

A substance contains 65.4 g Zinc, 12.0 g Carbon, and 48 g Oxygen. What is its empirical formula?
a) Zn1C1O2
b) Zn1C4O6
c) Zn1C1O3
d) Zn5C1O4

A sample of Magnesium and chlorine is found to have the empirical formula Mg2Cl4. A sample is put through a mass spectrometer and found to weigh 190 amu. It's molecular formula is...
a) Mg2Cl4
b) MgCl2
c) Mg2Cl5
d) MgCl3

The mass of 1 mole of Ba(OH)2 is
a) 154.3 g
b) 155.3 g
c) 171.3 g
d) 308.6 g

A substance has the empirical formula of CH2, with a sample measured as weighing 56 g/mol. The molecular formula is...
a) CH2
b) C4H8
c) C4H6
d) C8H4

What is the mass of a contained filled with 88.8 L of Nitrogen molecules?
a) 111 g/mol
b) 55.5 g/mol
c) i'm bored of making up answers
d) send help

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