What is the molarity of 900 mL of a solution that contains 100.0 g of dissolved NaCl? (hint: convert mL to L before using the above equations) *

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?

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?