because of the law of conservation of energy...
Molar mass of C6H8O7 = 12*6 + 1*8 + 16*7 = 72 + 8 + 112 = 192 u.
First you need the molar mass of citric acid. It is 192 g/mol. Now you can calculate the number of moles: 0.1 g x (1 mol/192 g) = 0.00052 mol
molar mass citric acid = 72 + 8 + 112 = 192g/mol 192 g x 1 mol/192g x 6.02x10^23 molecules/mole = 6.02x10^23 molecules
I do not see an isotope of iridium that does alpha decay. There is an interactive link to isotopes below. (Perhaps I am missing it.)
.192
Molar mass of C6H8O7 = 12*6 + 1*8 + 16*7 = 72 + 8 + 112 = 192 u.
First you need the molar mass of citric acid. It is 192 g/mol. Now you can calculate the number of moles: 0.1 g x (1 mol/192 g) = 0.00052 mol
molar mass citric acid = 72 + 8 + 112 = 192g/mol 192 g x 1 mol/192g x 6.02x10^23 molecules/mole = 6.02x10^23 molecules
192
1923 = 192 x 192 x 192 = 7077888
75% of 192= 75% * 192= 0.75 * 192= 144
192
10% of 192 = 10% * 192 = 0.1 * 192 = 19.2
192
1922 = 192 x 192 = 36,864
20 percent of 192 = 38.4 20% of 192 = 20% * 192 = 20%/100% * 192 = 384/10 or 38.4
192