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Chemistry > Things to know > Flashcards

Things to know Flashcards

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1
Q

Name the diatomic atoms

A 
Bromine
Iodine
Nitrogen
Chorine
Hydrogen
Oxygen
Fluoride
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2
Q

n=N/L

A

number of moles = number of particles/ Avogadro’s constant

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3
Q

Describe reactivity trends in group 1 and group 7.

A

reactivity increases DOWN group 1

Reactivity increases UP group 7

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4
Q

What is a group?

A

Vertical columns.

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5
Q

What is a period?

A

The rows.

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6
Q

How to find empirical formula?

A
  1. Find mass of each element
  2. Determine number of moles for each element
  3. Divide each by the smallest number of moles
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7
Q

The number of atoms must be the ______ on both sides of the equation.

A

SAME (aka balance the equation or die)

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8
Q

What is the equation for the percentage yield?

A

[Experimental (observed) / theoretical (given)] x 100%

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9
Q

Convert 0 degrees celsius to kelvins.

A

273 K

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10
Q

What process changes solid to gas and vice versa?

A

Sublimation/reverse sublimation

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11
Q

What process changes gas to liquid and vice versa?

A

condensation/ boiling or evaporation

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12
Q

What is STP?

A

273 k, 100kPa

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13
Q

What is RTP?

A

298 k (room temp), 100kPa

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14
Q

All gases have the same ______ at the same temperature and pressure.

A

molar volume

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15
Q

At RTP the molar volume of a gas is?

A

24 dm^3

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16
Q

At STP the molar volume of a gas is?

A

22,400 cm^3

17
Q

Given a gas, what is the equation to find the number of moles?

A

Actual Volume / Molar Volume (either 22,400 cm or 24 dm)

18
Q

Describe the relationship between pressure and volume (given all other factors remain constant).

A

It’s inversely proportional. An increase in volume reduces pressure.

19
Q

Temperature vs Pressure

A

The pressure is proportional to the absolute temperature measured in kelvin. (given everything else is constant)

20
Q

Under which conditions does a real gas behave most nearly like an ideal gas?

A

Low pressure and high temperature

21
Q

The atomic number of any atom is equal to the number of:

A

protons in the atom, only

Chemistry (15 decks)

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