Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Chemistry Physical > chapter 2 and 3 > Flashcards

chapter 2 and 3 Flashcards

1
Q

mass of electron

A

1/1836

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

mass of neutron

A

1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

mass of proton

A

1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what do neutrons do

A

neutrons act as a glue that holds the nucleus together despite the electrostatic repulsion between protons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what is the mass number

A

the neutrons plus the number of protons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what is the atomic number

A

the atomic number is the number of protons an atom holds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what is relative isotopic mass

A

relative isotopic is the mass of an isotope relative to 1/12 the mass of carbon 12

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what is relative atomic mass

A

relative atomic mass is the weighted mean mass of an atom relative to 1/12th the mass of carbon 12

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What equipment is used to find percentage abundances

A

with a spectrometer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

how does a spectrometer work

A

sample placed on the mass spectrometer
sample is vaporised
ions are accelerated heavier ions move quicker and are harder to deflect
this way the ions of each isotope are separated
ion is detected by the mass spectrometer and adds to the signal stronger signal = greater abundance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what is the mass to charge ratio

A

relative mass of ion /relative charge on ion = mass to charge ratio

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

ammonium charge NH4

A

1+

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

hydroxide charge OH

A

1-

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

nitrate ion charge NO3

A

1-

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

nitrite ion charge NO2

A

1-

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

hydrogen carbonate charge HCO3

A

1-

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

permanganate charge MnO4

A

1-

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

carbonate charge CO3

A

2-

18
Q

sulfate charge SO4

A

2-

19
Q

sulfite charge SO3

A

2-

20
Q

dichromate charge Cr2O7

A

2-

21
Q

phosphate charge PO4

A

3-

22
Q

what is avogadros constant

A

6.02 * 10^23

23
Q

how to calculate empirical formula

A

convert mass into moles
divide by smallest whole number
write empirical formula

24
Q

what is the empirical formula of a compound

A

simplest whole number ratio of of atoms in each element in a compound

25
Q

what is the molecular formula

A

the molecular formula is the number of atoms of each element in the molecule

26
Q

equation linking mole mass and mr

A

moles = mass/mr

27
Q

how to calculate molecular formula

A

convert percentage by mass into moles using moles = mass/mr
find the empirical formula
write mr of empirical formula
find number of the empirical formula by doing total mr/mr of empirical formula
times that number with all small number on the empirical formula to get the molecular formula

28
Q

equation that link moles concentration and volume

A

moles = concentration * volume us e decimetre cubes for the volume so divide by 1000 after finished to convert to cm cubed

29
Q

how to convert between moles and gas volume

A

for volume in cm^3 divide volume by 24000 for volume in dm^3 divide by 24 to get moles

30
Q

what is the ideal gas equation

A

the ideal gas equation is an equation used when wanting to find the volume of a gas not at room temperature and normal atmosphere

31
Q

what equation is used links pressure volume moles ideal gas constant temperature and moles

A

the ideal gas equation:
pv = nrt

32
Q

what does the p in in pv = nrt stand for and what unit does it have to be in

A

p stands for pressure and has to be in Pa

33
Q

what does the v in pv=nrt stand for and what are its units

A

v stands for volume and has theh values of metres cubed

34
Q

what does the n in pv = nrt stand for and what are its units

A

the n stands for moles and its units are mol

35
Q

what does the r in pv = nrt stand for and what are its units

A

the r is the ideal gas constant and is usually 8.31Jmol ^-1K-1

36
Q

what does the t in pv = nrt stand for and what are its units

A

t stands for temperature and is measured in kelvins

37
Q

how to convert between degrees celcius and Kelvin

A

+273

38
Q
A
39
Q

What is stoichiometry

A

stoichiometry is the ratio of the amount of moles of a substance in an equation

40
Q

What is the equation for percentage yield

A

(Actual yield / theoretical yield)*100

41
Q

What is the limiting reagent

A

The limiting reagent is the reactant that is not in excess

42
Q

What is the equation for atom economy

A

(Mr of all desired products / molar mass of all products) * 100

Chemistry Physical (5 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions