An iron cube is placed in liquid water. Which particles have higher kinetic energy?

In this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced?

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?

What is the molar mass of potassium nitrate, kno3