If a sample contains 100 g of a radioactive isotope , how much will be left after 3 half lives? If a sample contains 50 g of a radioactive isotope, how much will be left after 2 half lives?

The ph of carrots are 5.0 how it is classified a.acidic b.basic c.indicator d.neutral

Vi limitens. vastery test select the correct answer. which statement explains why large atoms are more reactive than small atoms? a. large atoms have valence electrons farther from the nucleus and lose them more readily. b. large atoms have greater ionization energy, which they can utilize during a reaction. c. large atoms have a greater number of electrons that they can lose during a reaction. d. large atoms have more energy levels, so they have more energy to pass on in a reaction. reset next

The vapor pressure of ethanol is 1.00 × 102 mmhg at 34.90°c. what is its vapor pressure at 61.61°c? (δhvap for ethanol is 39.3 kj/mol.)