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Chemistry Tests > Chemistry test Chapters 3 & 4 > Flashcards

Chemistry test Chapters 3 & 4 Flashcards

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1
Q

What is empirical formula for sugar fructose?

A

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2
Q

Know mole ratio concept in equation

A

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3
Q

If the empirical formula of a substance is know what additional information is needed to calculate the molecular formula?

A

Actual mass of substance

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4
Q

Know Nitrogen dioxide formula

A

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5
Q

Know copper (I)hydroxide formula?

A

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6
Q

Know calcium carbonate formula?

A

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7
Q

Know polyatomic ions

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8
Q

Know common ions charges

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9
Q

Name polyatomic ions put together?

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10
Q

Know and identify basic kinds of reactions.

A

Combination/synthesis reaction: a+b=ab

Decomposition: ab=a+b

Single displacement: a+bc=b+ac

Double displacement: ab+cd=ad+bc

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11
Q

What unit is equivalent to Avogadro’s number of objects?

A

1 mole

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12
Q

What is a set of symbols that tells how many of each type of atoms are found in a molecule?

A

Chemical formula

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13
Q

What is the sum of atomic masses of all atoms in a molecule?

A

Molecular mass

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14
Q

Know how to balance equations.

A

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15
Q

Know how to find a molecular mass.

A

Add up atomic masses from periodic table of substance

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16
Q

Know how to find molar mass

A

Molar mass=1 mole

Molar mass is atomic mass on periodic table

17
Q

Know how to calculate the percent composition of a substance.

A

Part/whole times 100

18
Q

Know how to determine empirical formula of something

A

Q

19
Q

Know how to determine moles and mass in grams

A

1 mole of substance is equal to its molar mass

1 mole is equal to 22.4 liters of substance

20
Q

Understand the law of conservation of mass and how a chemist could use it to predict the formula of an unknown product.

A

Reactants=products

Mass is never destroyed in a reaction only redistributed a different way from reactant to product.

21
Q

What is Avogadro’s number?

A

6.022times 10 to the 23rd power

Chemistry Tests (10 decks)

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