3.18 Moles within Moles and Molar Mass
Part 1:
a How many hydrogen and oxygen atoms are present in
1 molecule of H2O?
How many moles of hydrogen and oxygen atoms are
present in 1 mol H,O?
What are the masses of hydrogen and oxygen in
1.0 mol H¿0?
a What is the mass of 1.0 mol H¿O?
Part 2: Two hypothetical ionic compounds are discovered
with the chemical formulas XCh and YCh, where X and
Y represent symbols of the imaginary elements. Chemical
analysis of the two compounds reveals that 0.25 mol XCl
has a mass of 100.0 g and 0.50 mol YCh has a mass of
125.0 g.
What are the molar masses of XCh and YCh?
If you had 1.0-mol samples of XCh and YCh, how
would the number of chloride ions compare?
If you had 1.0-mol samples of XCh and YCh, how
would the masses of elements X and Y compare?
What is the mass of chloride ions present in 1.0
mol XCh and 1.0 mol YCh?
What are the molar masses of elements X and Y?
How many moles of X ions and chloride ions would
be present in a 200.0-g sample of XCl?
How many grams of Y ions would be present in a
250.0-g sample of YCh?
Ih
What would be the molar mass of the compound
YBrz?
Part 3: A minute sample of AIC1 is analyzed for chlorine.
The analysis reveals that there are 12 chloride ions present
in the sample. How many aluminum ions must be present
in the sample?
a
What is the total mass of AlCl, in this sample?
How many moles of AICl, are in this sample?