April 21, 2015

Homework Help: chemistry

Posted by Chris on Tuesday, April 15, 2008 at 8:31pm.

Element Symbol Atomic Mass
Bromine Br 79.904
Calcium Ca 40.078
Carbon C 12.011
Chlorine Cl 35.4527
Cobalt Co 58.93320
Copper Cu 63.546
Flourine F 18.9984032
Hydrogen H 1.00794
Iodine I 126.904
Iron Fe 55.847
Lead Pb 207.2
Magnesium Mg 24.3050
Mercury Hg 200.59
Nitrogen N 14.00674
Oxygen O 15.9994
Potassium K 39.0983
Sodium Na 22.989768
Sulfur S 32.066

Please try to show all work for questions 29-33.

29. What mass in grams of sodium hydroxide is produced if 20.0 g of sodium metal reacts with excess water according to the chemical equation 2Na(s)+2H20(l)=2NaOH(aq)+Hs(g)?

30. What mass in grams of 1-chloropropane (C3H7Cl) is produced if 400. g of propane react with excess chlorine gas according to the equation C3H8+Cl2=C3H7Cl+HCl?

31. How many grams of ammonium sulfate can be produced if 30.0 mol of H2SO4 react with excess chlorine gas according to the equation 2NH3(aq)+H2SO4(aq)=(NH4)2SO4(aq)?

32. How many moles of Ag can be produced if 350. g of Cu are reacted with excess AgNO3 according to the equation Cu(s)+2AgNO3(aq)=2Ag(s) +Cu(NO3)2(aq)?

33. What mass in grams of hydrogen gas is produced if 20.0 mol of Zn are added to excess hydrochloric acid according to the equation Zn(s)+2HCl(aq)=ZnCl2(aq)+H2( )?

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