Để trung hoà 2,45g axit cần 2g naoh xác định đương lượng gam của axit cho 0=16,h=1,na=23

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?

Compare and contrast solutions and suspensions

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.