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Chemistry I > Exam 3 Flashcards > Flashcards

Exam 3 Flashcards

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1
Q

What molecular orbital diagram do you use for O2 and F2?

A

pi bonds are above the sigma bond

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2
Q

What molecular orbital diagram do you use for B2, C2, and N2?

A

The pi bonds are UNDER the sigma bond.

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3
Q

What do you use to get the number of electrons of an individual atom/ion in a COMPLETE molecular orbital diagram?

A

total number of electrons

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4
Q

When creating a molecular orbital diagram for a diatomic ion…

A

add/subtract the electron(s) to the TOTAL number of electrons in the molecule

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5
Q

In a neutral substance, oxidation is…

A

zero

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6
Q

For ions, the oxidation number…

A

is the charge of the ion.

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7
Q

When H is combined with a more electronegative element, its oxidation number is…

A

+1

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8
Q

When H is combined with a less electronegative element, its oxidation number is…

A

-1

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9
Q

Elements in group 7 have an oxidation # of -1 when they are combined with…

A

a less electronegative element

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10
Q

The LEAST electronegative element is assigned…

A

a positive oxidation number

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11
Q

If the #mol and temperature are constant… (and what Law is this?)

A

pressure is inversely proportional to volume; Boyle’s Law

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12
Q

When #mol and volume are constant…(what law is this?)

A

temperature is proportional to pressure; Amonton’s Law

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13
Q

When #mol and pressure are constant… (what law is this?)

A

temperature is proportional to volume

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14
Q

When temperature and pressure are constant… (what law is this?)

A

mol is proportional to volume; Avogadro’s Law

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15
Q

When temperature and volume are constant…

A

pressure is proportional to #mol

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16
Q

Boyle’s Law in terms of KMT? (think about what it is first)

A

P is inversely proportional to V

Compression of the container INCREASES the #collisions, which INCREASES pressure

17
Q

Amonton’s Law in terms of KMT? (think about what it is first)

A

T is proportional to P;

increase in temperature INCREASES velocity, which INCREASES KE, which INCREASES #collisions, which INCREASES pressure

18
Q

Charles’s Law in terms of KMT? (think about what the law is first)

A

T is proportional to volume;

increase in temperature INCREASES velocity, which INCREASES KE, which increases #collisions, which INCREASES volume.

19
Q

Avogadro’s Law in terms of KMT? (think about what the law is first)

A

mol is proportional to volume;

increase in #mol (amount of gas) INCREASES #collisions which INCREASES the volume

20
Q

If the force of a gas is GREATER than the force of atmospheric pressure in a manometer, how do you find the gas pressure?

A

ADD the amount of pressure (in mmHg) to the height

21
Q

If the force of gas is LESS than the force of atmospheric pressure in a manometer, how do you find the gas pressure?

A

amount of pressure (mmHg) subtracted by height

22
Q

1 atm =

A

760 torr

23
Q

How do convert degrees Celsius to Kelvin?

A

add 273.15 to the temperature measured in degrees Celsius

24
Q

What is the ideal gas law?

A

PV = nRT

25
Q

A solid has _____ shape and a ______ volume.

A

fixed, fixed

26
Q

A liquid has a _______ shape and a _______ volume.

A

variable, fixed

27
Q

A gas has a _______ shape and a ______ volume.

A

variable, variable

28
Q

When naming a polyatomic acid that consists of a polyatomic ion ending with -ate…

A

change the ending to -ic

29
Q

When naming a polyatomic acid that consists of a polyatomic ion ending with -ite…

A

change the ending to -ous

30
Q

Per -ate ions have…

A

one MORE oxygen than the -ate ions

31
Q

-ite ions have…

A

one LESS oxygen than the -ate ion

32
Q

hypo -ite ions have…

A

TWO LESS oxygens than the -ate ions

33
Q

What is the vapor pressure of water?

A

23.8 Torr

34
Q

What is the trend for metallic character on the periodic table?

A

increase down a group, decrease across a period

Chemistry I (5 decks)

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