how many ions are in a mole of chloride, cl - ?
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How many ions are in a mole of chloride, Cl - ?. 6.022 x 10 23 ions= 1mol. What do a mole of chloride ions and a mole of xenon atoms have in common?. They both have the same amount of particles; 6.022 x 10 23 particles. Does a mole of Xenon have the same mass as a mole of chloride ions?. - PowerPoint PPT PresentationTRANSCRIPT
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How many ions are in a mole of chloride, Cl-
?
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6.022 x 1023 ions= 1mol
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What do a mole of chloride ions and a mole of xenon atoms have in
common?
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They both have the same amount of particles;6.022 x 1023 particles
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Does a mole of Xenon have the same mass as a
mole of chloride ions?
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No, according to the periodic table, each
substance has a different mass. They just are the
same number of particles.
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What’s the molar mass of chlorine?
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35.45g/mol
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Turn the previous question and answer
into a conversion factor.
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1 mol Cl 35.45g Cl 35.45g Cl or 1 mol Cl
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If a test question asked you to calculate average atomic mass what numerical data would have to be given in
the problem?
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The mass of the isotopes and the % abundance.
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Explain the difference between molecular and
empirical formulas.
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The empirical formula is the simplified ratio and the
molecular formula is how the molecule actually exists.
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How many significant figures does 700.10 have
in it?
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5
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Round 367.895 to the hundredths place.
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367.90
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What is the formula you use to help you determine
a molecular formula?
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Molecular mass empirical mass
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What is the third step in calculating an empirical
formula?
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Divide by small
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How can you check your answer in a percent composition
problem to make sure there are no obvious errors?
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Make sure the percents add up to 100%.
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How can you double check your answer in an average
atomic mass problem?
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Make sure the final average in amu is between the
masses given in the problem.
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What are the 5 possible units for Avogadro’s
number?
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Particles, ions, atoms, molecules, and formula units.
That means whenever you write 6.022 x 1023 you must have one of those units behind it. NOT g or mol.
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Tell whether the following is an atom or molecule.a)CO2
b)H2O
c)Ald)H2
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a) CO2 molecule
b) H2O molecule
c) Al atomd) H2 molecule
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How many conversions would you use if the given was atoms and the find
was grams?
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What is the mass of 1 atom of calcium?
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40.08amu