If an atom has an atomic number of 12 and a mass number of 16 how many protons does it have

200. ml of 3.00 m nacl solution is diluted to a final volume of 500. ml. what is the molarity of the final solution?

Suppose a lab group reports a ppercent yield of sand of 105. is it really possible to collect more sand than was originally represented? what is the possible explanation for the extra product?

Write a balanced equation showing the formation of copper (ii) nitrite from its elements