Home Early recorded sounds & wax cylinders Cylinder music shop An Edison commemorative 2nd page Note to early recordings collectors Cylinder of the month Links to related topics What's new Tinfoil resource center Cylinders of the month archive CJ's comics Copyright (C) (P) 1996-2015 Glenn Sage, Portland, Oregon.
1) That looks right. 2) Step 1: Moles=Mass/Mr, so it's 144/72= 2mol. Step 2: Stoichiometry means the ratio of oxygen to pentane is 1:8 so moles of oxygen is moles of pentane times 8. 2*8=16mol of oxygen. Step 3: 16= 9.6*10^24. 3) The ratio of oxygen to carbon in CO2 is 1:2. so it's 192/3 = 64.
The mass of 2.5 X 10 4 grapes is 50 kilograms, and that of an equal number of oranges is 1.2 X 10 3 kg. What is the mass ratio of a single single grape to a single orange? 3. A mole of carbon atoms has a mass of 12 grams, and a mole of magnesium atoms, 24 grams.he mass of 2.5 X 10 4 grapes is 50 kilograms, and that of an equal number of oranges is 1.2 X 10 3 kg. What is the mass ratio of a single single grape to a single orange? 3. A mole of carbon atoms has a mass of 12 grams, and a mole of magnesium atoms, 24 grams.