# Chemical Reactions and Reaction Stoichiometry chemistry homework help

1. A sample of ethane, C2H6ã€€is found to contain 3.00 x 1022ã€€atoms of H. How many molecules ofã€€C2H6ã€€are present?ã€€
2. Calculate the molar mass of menthol, C10H20O.
3. 20.0 g Na2CO3ã€€has how many moles of Na+
4. 15.0g Al(NO3)3ã€€has how many NO3?
5. Determine the number of moles of aluminum in 96.7 g of Al.
6. 8.00 g of C6H6ã€€has how many H atoms?
7. 15.0 g NH3ã€€has how many moles of H atoms?ã€€
8. The mass of 1.21ã€€x 1020ã€€atoms of sulfur is
9. How many Nitrogen atoms are present in 1.0 x 109ã€€molecules of Aspartame,ã€€ã€€C14H18N2O5.
10. Consider the reaction: 3H2ã€€+ N2ã€€–> 2NH3. If a mixture of 3.0 mole of H2ã€€and 3.0 mole N2ã€€is taken,ã€€how many moles of excess reactant remain unused?
11. A compound of Boron & Oxygen has 31.05% B and 68.95% O. What is its empirical formula?ã€€
12. Consider the reaction: 2H2ã€€+ O2ã€€–> 2H2O. If a mixture of 1.0 mole of H2ã€€and 1.0 mole O2ã€€is taken, how manyã€€gramsã€€of H2O can form?ã€€
13. What is theã€€coefficient of N2ã€€when the following equation is properly balanced with theã€€smallestã€€set ofã€€whole numbers?
14. ã€€_____N2H4+ _____N2O4ã€€Ã  ã€€___?__N2+ _____ H2Oã€€

15. Balance the following equation using the smallest possible integers and determineã€€the coefficient of HCl?ã€€
16. Fe2S3ã€€+ HCl –> FeCl3ã€€+ H2S

17. The fermentation of glucose C6H12O6ã€€producesã€€ethanol, C2H5OH and CO2.The equation for the reaction is as follows:ã€€C6H12O6 –>ã€€2C2H5OHã€€ã€€+ã€€2CO2.ã€€
18. How many moles of CO2ã€€are produced when 0.400 moles of C6H12O6ã€€are used?

19. The fermentation of glucose C6H12O6ã€€producesã€€ethanol, C2H5OH and CO2.The equation for the reaction is as follows:ã€€C6H12O6 –>ã€€2C2H5OHã€€ã€€+ã€€2CO2.ã€€
20. How many grams ofã€€C2H5OHã€€ã€€are produced when 0.400 moles of C6H12O6ã€€are used?
21. When balanced with smallest set of whole numbers, the coefficient of O2ã€€in the following equation is
22. __ C3H5OH+ __ O2ã€€–>ã€€__ CO2ã€€+ __ H2O

23. Which of the following is not correct?

Select one:

a.ã€€1mol of Cl2ã€€has 35.45 g Cl

b.ã€€1mol of NaCl has 6.022 x 1023ã€€Na+

c.ã€€1 mole of Ca3N2ã€€has 3 moles Ca+2

d.ã€€1 mol of O3ã€€has 1.81 x 1024ã€€O atoms