Ahome water softener has 75 000 cm3 of ion exchange resin with a capacity of 39 kg/m2 the occupants use 1800 l/day of water containing 0.24 mg/cm of hardness as caco3. if they want to soften the water to 78 mg/l as caco3, what percentage of water should bypass the unit? when will the unit need to be regenerated? (

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife

28. which is not a reason that water is used to store spent fuel rods from nuclear power plants? water increases the speed of the chain reaction in the fuel rods. water protects nuclear power plant workers from the high temperature and radiation of the fuel rods. water acts as a radiation shield to reduce the radiation levels. water cools the spent rods. salts action

Molecular iodine, i2(g), dissociates into iodine atoms at 625 k with a first-order rate constant of 0.271 s−1. part a part complete what is the half-life for this reaction?