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labwork [276]
3 years ago
8

ANSWER ASAP PLZ???????????????????????????????????

Chemistry
2 answers:
Furkat [3]3 years ago
7 0

Answer:

The answer should be A

Explanation:

sattari [20]3 years ago
7 0

Answer:

Leaving a Copper penny in vinegar until it turns green

Explanation:

the others are physical changes. when copper penny is put in vinegar, a reactive oixde layer is formed which is green in colour. namely, Cu(II) acetate.

The green growing on the penny of copper and the rust forming on the nail of iron are chemical changes. Boiling away salt water, scraping iron filings from a mixture of sand with a magnet, and breaking a rock with a hammer, are physical changes.

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1 liter is equal to milliliters​
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Answer:

1 litre is equal to 1000 millilitres

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Rob measures the solubility of three different salts in water at 22°C. Which type of graph should he use to display his data?. b
sveta [45]
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3 years ago
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The period number of krypton is 4

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2 years ago
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34 atoms of carbon react with 22 molecules of hydrogen gas. How many molecules of methane will be formed &amp; what will be left
pychu [463]
Each carbon atom will react with 4 hydrogen atoms to form methane (C H_{4}) Since there are 2 hydrogen atoms in a hydrogen molecule (H_{2}) then each carbon atom will react with 2 hydrogen molecules. Since there are 22 hydrogen molecules half as many methane molecules will be formed, so 11. Then we can subtract 11 from 34 to find the number of carbon atoms left over.

So in summary, 11 methane molecules will be formed and there will be 23 carbon atoms left over.
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3 years ago
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Automobile catalytic Converters use a platinum callus to reduce air pollution by changing emissions such as carbon monoxide CO2
natka813 [3]

Answer:

14 mol O₂

Explanation:

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2CO + O₂ → 2CO₂

As we can see from the balanced equation, 1 mol of O₂ is required to react with 2 moles of CO. Thus, the conversion factor is 1 mol of O₂/2 mol CO. We multiply the moles of CO by the conversion factor to calculate the moles of O₂ that are required:

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6 0
2 years ago
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