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Calculate the % composition of Al2O3?Group of answer choices47.1% AL, 52.9% O52.9% Al, 47.1% O28.3% Al, 71.7% O71.1% Al, 28>3% O62.8% Al, 37.2% O

Sagot :

First, we need to find the values of molar mass of Al and O at the periodic table:

Al : 27 g/mol

O: 16 g/mol

Now let's calculate the molar mass of Al2O3:

(2x27) + (16x3)

54 + 48 = 102 g/mol

Now let's calculate the percent of each element:

For Al:

102 ---- 100%

54 ---- x%

x = 52.9%

For O:

102 ---- 100%

48 ---- y%

y = 47.1%

Answer: 52.9% Al, 47.1% O

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