You are given 68 g of aluminum (Al) and excess water. How many grams of aluminum oxide (Al2O3) can you make? 4 Al + 3O2 --> 2Al2O3
Question 13 options:

95.84 g Al2O3

2.52 g Al2O3

128.48 g Al2O3

101.96 g Al2O3

The answer is d because i just took the test

Vander waals forces are inter molecular bonds that exist within molecules of the same substance. a water molecule is made up of oxygen and hydrogen atoms which share electrons between each other. the vander waals forces are forces that exist between multitude of different  molecules of water. dipole dipole forces is the type of vander waals force that exist in water. the oxygen atom which is more electronegative pulls the shared electron closer to itself thus generating a partial negative charge while the hydrogen acquire a partial positive charge. these two different charges causes attraction to occur in water molecules.

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