tjgirl
05-13-2012, 15:00
1. How many atoms of carbon are found in 2.6g of glucose (C6H12O6)?
2. The mass fraction of tin in a welding alloy in w(Sn)=42% and that of lead is w(Pb)=58%. Calculate the number of moles of each metal in 200g of this alloy.
3. What mass of carbon dioxide is produced from burning 100g of ethanol in oxygen according to the following reaction:
C2H5OH + 3O2 -----> 2CO2 + 3H2O
4. Calculate the mass in grams of Iodine required to react completely with 0.5 mols of aluminium.
2Al + 3I2 ------> 2AlI3
2. The mass fraction of tin in a welding alloy in w(Sn)=42% and that of lead is w(Pb)=58%. Calculate the number of moles of each metal in 200g of this alloy.
3. What mass of carbon dioxide is produced from burning 100g of ethanol in oxygen according to the following reaction:
C2H5OH + 3O2 -----> 2CO2 + 3H2O
4. Calculate the mass in grams of Iodine required to react completely with 0.5 mols of aluminium.
2Al + 3I2 ------> 2AlI3