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vova2212 [387]
3 years ago
6

Galaxies are composed of many different objects. What kind ok objects make up most of the visible matter in a galaxy?

Chemistry
2 answers:
seraphim [82]3 years ago
8 0
Stars you could include the sun to it is a star anyway
Arte-miy333 [17]3 years ago
5 0
Stars make up most of the visible matter
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How many moles of oxygen gas (O2) are in a 2.50 L container at standard temperature and pressure?
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Hey there!:

1 mole O2 ----------------- 22.4 L  ( at STP )

( moles O2 ) -------------- 2.50 L

moles O2  = 2.50 * 1 / 22.4

moles O2 = 2.50 / 22.4

moles O2 =  1.12*10⁻¹


Answer B


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Why are Noble gases inert?
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