You leave a piece of bread outside for a few days. it forms green and blue mold. it smells awful. a chemical change has occurred - true or false
explain you answer stating facts that support your answer.

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

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?

An atom with 7 protons, 6 neutrons, and 7 electrons has an atomic mass of amu. (enter a whole number.) numerical answers expected! answer for blank 1: