For the radioactive decay of radium-226, ²²Ra → 222Rn + He, calculate AE in 226 88 86 kilojoules when 2.2 g of radium decays. Mass of He: 4.0015 g Mass of 222Rn: 221.9703 g 86 Mass of 22Ra: 225.9771g 88 Hint: Mass defect can be set up as: m = mass of products - mass of reactants (Include signs, and use two decimal places. No units in answer.)

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222
For the radioactive decay of radium-226, ²²Ra → ²²²Rn + He, calculate AE in
86
kilojoules when 2.2 g of radium decays.
Mass of He: 4.0015 g
Mass of 222Rn: 221.9703 g
86
226
Mass of 2Ra: 225.9771g
Hint: Mass defect can be set up as: m = mass of products mass of reactants
(Include signs, and use two decimal places. No units in answer.)
Write exponential answers in this format: 6.022E23 (for 6.022x10^23). No spaces.
Transcribed Image Text:226 222 For the radioactive decay of radium-226, ²²Ra → ²²²Rn + He, calculate AE in 86 kilojoules when 2.2 g of radium decays. Mass of He: 4.0015 g Mass of 222Rn: 221.9703 g 86 226 Mass of 2Ra: 225.9771g Hint: Mass defect can be set up as: m = mass of products mass of reactants (Include signs, and use two decimal places. No units in answer.) Write exponential answers in this format: 6.022E23 (for 6.022x10^23). No spaces.
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