The first thing you will need to do in lab this week is to prepare a ~0.1M solution of NaOH, which you will standardize. You will prepare 250-mL of this solution using a 30% (m/v) NaOH stock solution. How many mL of the NaOH stock solution will you need to prepare the 0.1M solution

What is the formula that this ionic compounds could form sr2+p3-o2-

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