How many moles are in 25.0 grams of KMnO4? (3 points) a 0.124 mol KMnO4 b How many moles of each element are in one mole of Sr(HCO3)2? (3 points) a 1 mole of strontium, 1 mole of hydrogen, 1 mole of carbon, 5 moles of O b 1 mole of strontium, 2 moles of hydrogen, 2 moles of carbon, 6 moles of O c 2 moles of strontium, 2 moles of hydrogen, 2 moles of carbon, 5 moles of O d 2 moles of strontium, 2 moles of hydrogen, 2 moles of carbon, 6 moles of O0.158 mol KMnO4 c 0.199 mol KMnO4 d 0.316 mol KMnO4

h let me think

"the periodic table is arranged in order of atomic number."

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