Phosphorus-32 has a half life of 2 weeks. After 4 weeks, how much of 100 grams of a sample of phosphorus-32 remains undecayed?
Answer without units.

Which of these reactions are redox reactions? check all that apply.cd + hcl → cdcl2  + h2cucl2  + na2s → 2nacl + cuscaco3  → cao + co2          2zns + 3o2  → 2zno + 2so2          ch4  + 2o2  → co2  + 2h2o

Achemist 16 drop copper metal from copper chloride solution. the chemist place is 0.50 g of aluminum foil in a solution containing 0.75 g of copper (ii) chloride. a single replacement reaction takes place. which statement explains the maximum amount of copper that the chemist can extract using this reaction?

How much heat is added if 0.814g of water increase in temperature by 0.351 degree c?