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san4es73 [151]
2 years ago
6

Advantages of solar energy

Chemistry
2 answers:
erastova [34]2 years ago
8 0
Renewable energy source
reduces electric bills
low maintenance costs
reduced needs for fossil fuels and foreign oils
Scorpion4ik [409]2 years ago
8 0
Another one is Electricity use
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Us<br> What is the percent of O in<br> Cr2O3?<br> (Cr = 52.00 amu, O = 16.00 amu)<br> [? ]%
Gekata [30.6K]

The percent of O in  Cr₂O₃ : 31.58%

<h3>Further explanation</h3>

Given

Cr = 52.00 amu, O = 16.00 amu

Required

The percent of O

Solution

MW Cr₂O₃ = 2 x Ar Cr + 3 x Ar O

MW Cr₂O₃ = 2.52+3.16

MW Cr₂O₃ =152 amu

\tt \%O=\dfrac{3.Ar~O}{MW~Cr_2O_3}\times 100\%\\\\\%O=\dfrac{3.16}{152}\times 100\%\\\\\%O=31.58\%

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Yuki888 [10]

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