hòa tan hoàn toàn 14,3 gam hỗn hợp gồm Al và FeCO3 bằng dd h2so4 loãng dư thì khối lượng dd sau phản ứng tăng so h2so4 ban đầu 9,6 gam . tính khối lượng Al va feco3 trog X ?

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

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