2 Al2O3 4 Al + 3 O2 How many grams of oxygen are produced by the decomposition of 125.0 g of aluminum oxide?
X
Х
Х
:: 1 mol O2
:: 3 mol O2
:: 32.0 g 02
:: 58.85 g 02
:: 125.0 g Al2O3
:: 101.96 g Al203
:: 1 mol Al2O3
:: 2 mol Al2O3

samuel de champlain. in 1608, king henry iv sponsored pierre dugua, sieur de mons and samuel de champlain as founders of the city of quebec with 28 men. this was the second permanent french settlement in the colony of canada.

the answer is c

tell me if wrong

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