I've been looking up some methods to solve volume-volume and mass-mass stoich problems, but haven't found one that breaks it down enough for me.Here are some examples off of this paper I have to do-H4SO4 + 2NaOH - H2) + Na2SO4How many molecules of water are produced if 2.0g of sodium sulfate are produced in the above reaction?and2AlCl3 - 2Al + 3Cl2If 10.0g of aluminum chloride are decomposed, how many molecules of cl2 are produced?And please don't just give the answers, but also how you arrived at it so I can try to understandI appreciate it!10 points
The trick is to not work with the number of grams of the reactants and products, but the number of moleWhenever you get a question like this, divide the number of grams by the molar mass of the relevant substanceFor example, the first question has two grams of sodium sulfateSodium sulfate has a molar mass of 46+64+32.1 142.1Therefore, the number of mole is 2/142.1 0.014 molAt this point, you have to consider the relationship between the number of moles of the value you know, and that which you need to find outIn this case it's easy, because it's a 1:1 relationship (One mole of water is produced for every mole of sodium sulfate produced)Thus the number of molecules is this number multiplied by Avogadro's number(0.014x6.02x10^23) Therefore, in this equation, the number of moles of water produced is the same as the mole value aboveI'll leave you to do that final calculation and the other example you've given by yourself, but I'll give you a hint: Take careful note of the 2:3 relationship of aluminium chloride to chlorine gasI hope that helpedGood luck:)
ditch the mayo cheese and top bun if you want to scrape off 250 calories from a restaurant sandwich
fly a kite for 20 minutes
Use calorie calculator to figure out how many calories you re consuming daily
