An element has two naturally occurring isotopes with atomic masses of 112.90 amu and 114.90 amu. The relative abundances of these elements are 4.29% and 95.71%, respectively. What is the average atomic mass of the element?

22. a flask containing 450 ml of 0.50 m h2so4 was accidentally knocked to the floor. how many grams of nahco, do you need to put on the spill to neutralize the acid according to the following equation: h2so4(aq)+2 nahcos(aq) na, so(aq) +2 h20()+2 co2(g) d) 38 g a) 2.3 g b) 9.5 g c) 19 g