formulas

Question 1

actual size

Answer 1

measured length / magnification

Question 2

catalytic converter

Answer 2

reduction:
2NO – N2 + O2

oxidation:
2CO + O2 – 2CO2

Question 3

aerobic respiration

Answer 3

C6H12O6 + 6O2 – 6CO2 + 6H2O ENERGYY

Question 4

anaerobic respiration

Answer 4

C6H12O6 – 2C2H5OH + 2CO2

Question 5

energy from specific heat capacity

Answer 5

q = m c ∆t

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

Question 6

moles in solid

Answer 6

moles

=

mass / Mr

Question 7

concentration

moles in liquid

Answer 7

conc.

=

moles / vol (dm^3)

Question 8

dm^3 into litres and cm^3

Answer 8

1 dm^3

=

1 litre
or
1000cm^3

Question 9

moles in a gas

Answer 9

moles

=

volume / 24dm^3

Question 10

work done

Answer 10

force x distance

Question 11

force

Answer 11

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

Question 12

GPE

gravitational potential energy

Answer 12

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

Question 13

KE

kinetic energy

Answer 13

1/2 mass (Kg) velocity^2

1/2mv^2

Question 14

efficiency

Answer 14

useful energy output / total energy input x 100

Question 15

velocity

in terms of waves

Answer 15

f x λ

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

Question 16

acid + metal

Answer 16

salt + hydrogen

Question 17

acid + metal oxide

Answer 17

salt + water

Question 18

acid + metal carbonate

Answer 18

salt + water + carbon dioxide

Question 19

acid + base/alkali

Answer 19

salt + water

Question 20

salt

Answer 20

acid + metal

Question 21

acid

Answer 21

hydrogen ions

Question 22

alkali

Answer 22

hydroxide ions

except ammonia NH3

Question 23

alkane

Answer 23

Cn H2n+2

Question 24

alkene

Answer 24

Cn H2n

Question 25

alcohol

Answer 25

Cn H2n+2 O

Cn H2n+1 OH

Question 26

voltage

in terms of coil number

Answer 26

V1 / V2 = N1 / N2

Question 27

voltage

in terms of current

Answer 27

V1 I1 = V2 I2

Question 28

alpha decay

Answer 28

helium
y waves
subtract 2 from bottom
subtract 4 from top

Question 29

beta decay

Answer 29

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

Question 30

1 volt

Answer 30

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

Question 31

charge

Answer 31

charge
(coulombs)

=

current x time

Q = I x t

Question 32

voltage

Answer 32

current (amps) x resistance

Question 33

resistance in series

Answer 33

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

Question 34

resistance in parallel

Answer 34

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

Question 35

pressure and temperature

Answer 35

P1 / T1

=

P2 / T2

Question 36

pressure and volume

Answer 36

P1 V1 = P2 V2