formulas Flashcards

1
Q

actual size

A

measured length / magnification

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2
Q

catalytic converter

A

reduction:
2NO – N2 + O2

oxidation:
2CO + O2 – 2CO2

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3
Q

aerobic respiration

A

C6H12O6 + 6O2 – 6CO2 + 6H2O ENERGYY

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4
Q

anaerobic respiration

A

C6H12O6 – 2C2H5OH + 2CO2

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5
Q

energy from specific heat capacity

A

q = m c ∆t

energy (J) = mass (Kg) x specific h. c. (J/g/K) x temp change (K)

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6
Q

moles in solid

A

moles

=

mass / Mr

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7
Q

concentration

moles in liquid

A

conc.

=

moles / vol (dm^3)

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8
Q

dm^3 into litres and cm^3

A

1 dm^3

=

1 litre
or
1000cm^3

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9
Q

moles in a gas

A

moles

=

volume / 24dm^3

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10
Q

work done

A

force x distance

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11
Q

force

A

mass (Kg) x acceleration (m/s^2)

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12
Q

GPE

gravitational potential energy

A

mass (Kg) x gravity x height from ground (m)

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13
Q

KE

kinetic energy

A

1/2 mass (Kg) velocity^2

1/2mv^2

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14
Q

efficiency

A

useful energy output / total energy input x 100

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15
Q

velocity

in terms of waves

A

f x λ

frequency (Hz or waves per second) x wavelength (m)

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16
Q

acid + metal

A

salt + hydrogen

17
Q

acid + metal oxide

A

salt + water

18
Q

acid + metal carbonate

A

salt + water + carbon dioxide

19
Q

acid + base/alkali

A

salt + water

20
Q

salt

A

acid + metal

21
Q

acid

A

hydrogen ions

22
Q

alkali

A

hydroxide ions

except ammonia NH3

23
Q

alkane

A

Cn H2n+2

24
Q

alkene

A

Cn H2n

25
Q

alcohol

A

Cn H2n+2 O

Cn H2n+1 OH

26
Q

voltage

in terms of coil number

A

V1 / V2 = N1 / N2

27
Q

voltage

in terms of current

A

V1 I1 = V2 I2

28
Q

alpha decay

A

helium
y waves
subtract 2 from bottom
subtract 4 from top

29
Q

beta decay

A
0
-1      β
y waves
top stays same
bottom add one
30
Q

1 volt

A

1 joule of energy per coulomb of charge (volts, V)

31
Q

charge

A

charge
(coulombs)

=

current x time

Q = I x t

32
Q

voltage

A

current (amps) x resistance

33
Q

resistance in series

A

R(T) = R (1) + R (2) + R(3)

34
Q

resistance in parallel

A

1/R = 1/R(1) + 1/R(2) + 1/R(3)

35
Q

pressure and temperature

A

P1 / T1

=

P2 / T2

36
Q

pressure and volume

A

P1 V1 = P2 V2