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xxMikexx [17]
3 years ago
14

OMG I GOT A 50% ON MY QUIZ BUT ALL I DID WAS ASK Y'ALL. I NEED COMFORTAGE AND DO NOTTTT FORGET I AM AUTISTIC GUYS!!! THANKX

Chemistry
2 answers:
Maslowich3 years ago
7 0

Answer:just breath its ok just use brainly

Explanation:

stich3 [128]3 years ago
4 0

Answer:

Cool im proud of you!

Explanation:

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Hydrogen fuel cells that operate at lower temperatures use more expensive platinum electrode catalysts.
mote1985 [20]
The correct answer is B) they operate at a higher efficiency. sorry hope the answers not to late :(
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4 years ago
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If 335 g water at 35.5C loses 5750 J of heat, what is the final temperature of the water?
White raven [17]

Answer:

The final temperature is  39.58 degree Celsius

Explanation:

As we know

Q = m * c * change in temperature

Specific heat of water (c) = 4.2 joules per gram per Celsius degree

Substituting the given values we get  -

5750 = 335 * 4.2 * (X - 35.5)

X = 39.58 degree Celsius

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3 years ago
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Irina18 [472]

How many moles of oxygen atoms are present in 5 moles of Mg3(PO4)2

All you have to do is to create a ratio between the molecule and the oxygen atom.

5 moles of Mg3(PO4)2 (4x2 moles O/1 mole Mg3(PO4)2) = 40 moles of oxygen

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