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Anastasy [175]
2 years ago
5

The acid from burning coal is rained back down onto the planet surface and reacts with

Chemistry
1 answer:
jeka942 years ago
4 0
What? Why does it have a question mark it makes no sense because there isn’t any options and you didn’t explain what the question is about.
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As the volume of confined gas decreases at the constant temperature, the pressure exerted by the gas________________.
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As the volume of the confined gas decreases at the constant temperature, the pressure exerted by the gas increases.
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Question 11 (3 points)
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A: gain 2 ions
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Write the formulas of the compounds formed by Al3+ with the following anions: NO3−, HCO3−, SO32−, PO43−. Use the given order of
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Al(NO₃)₃
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4 0
3 years ago
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an iron bar weighed 664 g. after the bar had been standing in moist air for a month, exactly one-eighth of the iron turned to ru
DaniilM [7]

The final mass of the iron bar and the rust when the weight of the bar was 664g and the bar had been standing in moist air for a month, will be 688.456g.

One-eighth of the iron bar turns to rust, which means the mass of the iron bar that has undergone rusting= 664/8= 83g

Thus, the mass of pure iron left after rusting has taken place will be= (664-83)g= 581g.

The equation of rusting is as follows

4Fe + 3O2 + 6H2O → 4Fe(OH)3

Molecular weight of iron is 55.84g, thus iron will undergo the reaction= 83/55.84= 1.486 mole

Mass of Fe2O3= 159.68g

4 moles of iron produce 4 moles of rust or iron oxide

Thus, 1.486 mole of iron will produce 1.486 mole iron oxide

Mass of iron oxide= 159.68/ 1.486

Mass of rust           = 107.456g

Therefore, mass of iron bar= (581+ 107.456)g

                                            = 688.456g

To learn more about rusting, click

brainly.com/question/18376414

#SPJ4

5 0
2 years ago
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