How much mass would a nucleus that is composed of 15 protons and 18 neutrons have?

Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density

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

Explain what happens at the saturation point when adding salt to water at room temperature.