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sleet_krkn [62]
3 years ago
6

Can someone help me with this question. I’ll mark brainliest

Chemistry
1 answer:
Lisa [10]3 years ago
8 0

Answer:

sodium carbonate im pretty sure (the formula is Na2CO3)

Explanation:

hope this helps :))

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A gas-filled balloon with a volume of 2.90 L at 1.20 atm and 20°C is allowed to rise to the stratosphere (about 30 km above the
scZoUnD [109]

Answer:

The final volume is 990.8 L

Explanation:

Let calculate the moles of gas in the first situation:

P . V = n . R . T

1.20 atm . 2.90 L = n . 0.082 . 293K

(1.20 atm . 2.90 L) / (0.082 . 293K) = 0.145 moles

This are the same moles in the second situation:

P . V = n . R . T

0.003atm . V = 0.145 moles . 0.082 . 250K

V = (0.145 moles . 0.082 . 250K) / 0.003atm

V = 990.8 L

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Explanation:

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mrs_skeptik [129]

Answer:

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Explain how balanced and unbalanced forces affect an object's motion differently.
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How many significant figures are in the number 20300?​
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