1. with a half-life of 29 years, how long will it take for 600g of strontium-90 to decay to 200g?

1. calculate the approximate enthalpy of the reaction in joules. estimate that 1.0 ml of vinegar has the same thermal mass as 1.0 ml of water. iqnore the thermal mass of th sodium bicarbonate. note: it takes about 4.2 joules () to change 1.0 gram (1.0ml) of water 1.0 c

What does the mass of 0.7891 mol of ferric oxide (fe2o3)

Which statement best describes the flow of energy in this scenario