What is a flame test used for? A. To remove impurities from a sample through burning
B. To identify an unknown sample by its emission spectrum
C. To identify an unknown sample by its melting point
D. To determine the ionization energies of electrons

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

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?

Harry lives in a city, and he has a lung condition known as asthma. on certain days, harry has to stay inside because pollutants in the air make it difficult for him to breathe. which of these pollution sources are nonpoint sources that might bother harry if he goes outside? choose the two that apply.