3. In a closed room containing 40 m3 of air and an electric fan to promote uniform mixing,
how many kilograms of a typical combusti-
ble would have to burn to create an atmo-
sphere that might incapacitate people in 30
minutes? Assuming Haber's rule holds, how
many burned kilograms of fuel might cause
incapacitation in 10 minutes?

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally