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murzikaleks [220]
3 years ago
12

PLSSS HELP!! In the demonstration, Iron reacted with the oxygen in the air. Which one ran out

Chemistry
1 answer:
Yanka [14]3 years ago
3 0
It has to be iron because oxygen doesn’t run out unless being used by something like sticking it in a bubble.
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Find the mass of 4.5 moles of H3PO4
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Hey there!

H₃PO₄

Find molar mass.

H: 3 x 1.008 = 3.024

P: 1 x 30.97 = 30.97

O: 4 x 16 = 64

---------------------------------

                  97.994 grams

The mass of 1 mole of H₃PO₄ is 97.994 grams.

We have 4.5 moles.

97.994 x 4.5 = 440

The mass of 4.5 moles of H₃PO₄ is 440 grams.

Hope this helps!

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3 years ago
Ar (g) is placed in a 3.80 L container at 320 K. The gas pressure is 0.496 atm.
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Answer:

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We can solve for the number of moles of Ar by making N the subject..

Always make sure you pressure is In atm, your Volume is in Litres and temperature in degree Kelvin.

Also Recall the universal gas constant R used in this type of questions which is 0.08206.

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