DIRECTIONS: A. How many atoms are in each of the following samples?
a.11.3g Pb
b.44.2g Mg
B. Calculate the mass in grams of each of the following samples.
a.1.50x10^18 atoms Ne
b.8.35x10^21molecules CH4
1. What is the percent composition of the following compounds? a.Naphtalene(C10 H8 )
b.Sucrose(C12 H22 O11 )
c.Aluminum sulfate(Al2(SO4)3
A) a) "3.28\u00d7\u00d710 ^{21}" Atoms
b) "1.109\u00d710 ^{23}" Atoms
B) a) 1,200g
b) 8.67g
1.a) Naphtalene(C10 H8 )
C=93.75%,H=6.25%
b) Sucrose(C12 H22 O11 )
C=42.11%,H=6.43%,O=51.46%
c)Aluminum sulfate(Al2(SO4)3
Al=15.79%,S=28.07%,O=56.14%
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