Unit 4: The Mole | Baamboozle - Baamboozle | The Most Fun Classroom Games!

English 16 Public

The mole, molar conversions, percent composition, empirical formulas, molecular formulas

Study Slideshow

What is the value of Avogadro's number?

6.022 * 10^23 particles

5

How many atoms are in 2.53 moles of sulfur?

1.52 * 10^24

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How many molecules are in 23.5 g of nitrogen? (Remember: HNFOICB!!!)

5.05 * 10^23 N2 molecules

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How many ammonium ions are formed when 0.25 moles of ammonium chromate are dissolved in water?

3.0 * 10^23 ammonium ions

25

The type of error when a balance consistently weighs high by 5%

Systematic error

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Error that can be reduced by repeated trials

Random error

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Empirical formula for a compound with 85.63% C and 14.37% H

CH2

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Molecular formula of a compound with an empirical formula NO2 and molar mass of 92.011 g/mol

N2O4

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An unknown compound is 63.02% C and 5.3% H, the rest is O. What is the empirical formula?

C8H8O3

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Find the molecular formula of a compound containing 31.58% C, 5.30% H, and O. A 1.4 mole sample has a mass of 212.95 g.

C4H8O6

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Mass percent of carbon in CH4?

74.87% carbon

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Mass percent of hydrogen in ethane

20.11% H

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Mass percent of all elements in sodium bicarbonate?

Na: 27.37% ; H: 1.20% ; C: 14.30% ; O: 57.14%

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Mass percent of nitrogen in ammonium nitrate?

35.00% N

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How many sig. figs. are in 0.0100?

3

5

Solve and round to the correct sig figs: 53.0 + (1.4*10^3)

1500

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