An atom of potassium has an atomic mass of 39 amu and an atomic number of 19. it therefore has neutrons in its nucleus. a. 19 c. 20 b. 39 d. 2

If you add 10ml of hot water to 10ml of cold water and the change in tempature 8°c calculate how much energy is gained by the cold water

What are the 4 phases of matter in order of increasing engery content?

Achemistry student weighs out 0.306 g of citric acid (h3c6h5o7), a triprotic acid, into a 250 ml volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with 0.1000 m naoh solution. calculate the volume of naoh solution the student will need to add to reach the final equivalence point. be sure your answer has the correct number of significant digits.