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Alchen [17]
3 years ago
11

Which of the following is a chemical change?

Chemistry
2 answers:
elena-s [515]3 years ago
3 0
Hi I'm in Chemistry too this year,
I believe D is correct because usually physical changes are things like density, color or quantity.
NNADVOKAT [17]3 years ago
3 0
D splitting water into hydrogen and oxygen yes because there is a chemical reaction with the molecules that changes the water
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Answer:

Option A = 2.2 L

Explanation:

Given data:

volume of one mole of gas = 22.4 L

Volume of 0.1 mole of gas at same condition = ?

Solution:

It is known that one mole of gas at STP occupy 22.4 L volume. The standard temperature is 273.15 K and standard pressure is 1 atm.

For 0.1 mole of methane.

0.1/1 × 22.4 = 2.24 L

0.1 mole of methane occupy 2.24 L volume.

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Answer:

Initially 1.51\times 10^{-2} moles of nitrogen dioxide were in the container .

Explanation:

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Initially 1.51\times 10^{-2} moles of nitrogen dioxide were in the container .

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Answer:

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