formulas Flashcards
actual size
measured length / magnification
catalytic converter
reduction:
2NO – N2 + O2
oxidation:
2CO + O2 – 2CO2
aerobic respiration
C6H12O6 + 6O2 – 6CO2 + 6H2O ENERGYY
anaerobic respiration
C6H12O6 – 2C2H5OH + 2CO2
energy from specific heat capacity
q = m c ∆t
energy (J) = mass (Kg) x specific h. c. (J/g/K) x temp change (K)
moles in solid
moles
=
mass / Mr
concentration
moles in liquid
conc.
=
moles / vol (dm^3)
dm^3 into litres and cm^3
1 dm^3
=
1 litre
or
1000cm^3
moles in a gas
moles
=
volume / 24dm^3
work done
force x distance
force
mass (Kg) x acceleration (m/s^2)
GPE
gravitational potential energy
mass (Kg) x gravity x height from ground (m)
KE
kinetic energy
1/2 mass (Kg) velocity^2
1/2mv^2
efficiency
useful energy output / total energy input x 100
velocity
in terms of waves
f x λ
frequency (Hz or waves per second) x wavelength (m)
acid + metal
salt + hydrogen
acid + metal oxide
salt + water
acid + metal carbonate
salt + water + carbon dioxide
acid + base/alkali
salt + water
salt
acid + metal
acid
hydrogen ions
alkali
hydroxide ions
except ammonia NH3
alkane
Cn H2n+2
alkene
Cn H2n
alcohol
Cn H2n+2 O
Cn H2n+1 OH
voltage
in terms of coil number
V1 / V2 = N1 / N2
voltage
in terms of current
V1 I1 = V2 I2
alpha decay
helium
y waves
subtract 2 from bottom
subtract 4 from top
beta decay
0 -1 β y waves top stays same bottom add one
1 volt
1 joule of energy per coulomb of charge (volts, V)
charge
charge
(coulombs)
=
current x time
Q = I x t
voltage
current (amps) x resistance
resistance in series
R(T) = R (1) + R (2) + R(3)
resistance in parallel
1/R = 1/R(1) + 1/R(2) + 1/R(3)
pressure and temperature
P1 / T1
=
P2 / T2
pressure and volume
P1 V1 = P2 V2
