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weeeeeb [17]
3 years ago
13

Burning a piece of wood in fire can be best described as a chemical change because the atoms in wood change their state. physica

l change because the atoms in wood are turned into a gaseous product. chemical change because the atoms in wood and oxygen are rearranged. physical change because the atoms in wood are turned into black ash.
Chemistry
2 answers:
Phoenix [80]3 years ago
6 0
The answeris c, chemicalchange because the atoms in woodand oxygen are rearranged.
Misha Larkins [42]3 years ago
6 0

Answer: chemical change because the atoms in wood and oxygen are rearranged.

Explanation: The chemical composition of wood varies from species to species, but is approximately 50% carbon, 42% oxygen, 6% hydrogen, 1% nitrogen, and 1% other elements.

When wood is being combusted in air(oxygen being the gas that rekindles the glowing splint), the chemicals are rearranged. Since about 50% of wood is carbon, C, the main chemical reaction going on here is C + O2 --> CO2. Of course, there are other chemical reactions too. But the formation of CO2 is the most common.

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During a lab, you heat 1.62 g of a CoCl2 hydrate over a Bunsen burner. After heating, the final mass of the dehydrated compound
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Answer is: formula of hydrate is CoCl₂· 6H₂O -c<span>obalt(II) chloride hexahydrate
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m(H₂O) = 0,74 g.
n(H₂O) = m(H₂O) ÷ m(H₂O) 
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n(H₂O) = 0,041 mol.
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Answer:

The correct answer to the question is

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