Answer:
Given, 0.29 g of hydrocarbon produces 448ml of CO2 at STP. then, C2H5 is the emperical formula of hydrocarbon . n = 2 , hence, molecular formula will be C4H10
CH4+2O2–>CO2+2H2O
4Fe+3O2–>2Fe2O3
Answer:6.022 x 10^23 molecules
Explanation: Since one mole of any chemical compound always contains 6.022 x 10^23 molecules, you can calculate the number of molecules of any substance if you know its mass and its chemical formula.
If you wanted to find a sample of fermium,which has an atomic mass of 100 I would look deep under the earth
I think is important to make a data table because when you do the same experiment if you get the same its because your right?