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3 years ago

How many molecules are in 0.25 mole of O2

1 answer:

5 0

1 mole O2 -------------------- 6,02.10²³ molecules
0,25 mole O2 ---------------- x molecules

1 . x = 0,25 . 6,02.10²³

x = 1,50.10²³ molecules

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What is the correct name for the compound, P2O5?

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Answer:

Part a:

Isobars: Ca-41, K-41 and Ar-41

Part b:

Number of proton

Part c:

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Explanation:

Part a:

Nuclei with same mass number are called isobars.

Given:

Ca-40, Ca-41, K-41 and Ar-41

Ca-41, K-41 and Ar-41 have equal mass numbers, so these are isobars.

Part b:

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Part c:

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H3CH2COCH2CH2CH3

<em>Ether:</em>

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R---O---R or R'---O----R or R'---O---R'

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to learn more about electrochemical cell

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