CHAPTER 3 (some answers)

5.a ---- 1.36 EXP 23 atoms of CH4, 2.72 EXP 22 molecules of CH4


5.c ---- 3.011 EXP 20 atoms


6.a ---- 2.658 mol Na


6.d ---- 1.99 EXP -4 mol CO2


6.e ---- 0.09997 ml Zn


7.a ---- 69 g NH4Cl


7.c ---- 0.271 g NO2


7.f ---- 2.001 g C2H5OH


8.a ---- 3.02 EXP 22 molecules of MgCl2, 9.07 EXP 22 atoms of MgCl2


9.b ---- 0.314 mol NH4Cl


9.d ---- 2.71 EXP 23 molecules CO


9.f ---- 1.08 EXP -13 mol H2O


9.h ---- 5.56 EXP 3 mol glucose


ALSO TRY TO FIND:
a) # of grams in 100 mol H --- 100g
b) # of atoms in 5g O --- 1.88 EXP 23 atoms
c) The mass of 6.022 EXP 23 atoms O --- 16g