3 years ago

Thermal energy is the energy associated with

Chemistry

2 answers:

olganol [36]3 years ago

7 0

Your answer would be Heat.

Hope this helps.

-Abigail.

Artemon [7]3 years ago

5 0

Thermal energy is associated with heat

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If 43.7 g of iron is completely used to produce 62.5 g of iron (III) oxide, how many grams of oxygen are involved in the reactio

Kobotan [32]

Mass of Oxygen : 18.8 g

<h3>Further explanation</h3>

Reaction(balanced) :

4Fe + 3O₂ → 2Fe₂O₃

mass Fe = 43.7 g

mol Fe(MW= 55,845 g/mol) :

$\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{43.7}{55.845}\\\\mol=0.783$

mol O₂ : mol Fe = 3 : 4, so mol O₂ :

$\tt \dfrac{3}{4}\times 0.783=0.5873$

Mass O₂(MW=32 g/mol) :

$\tt mass=mol\times MW\\\\mass=0.5873\times 32\\\\mass=18.7936~g\approx 18.8$

Or simply you can Conservation of mass, where the masses before and after the reaction are the same

<em>mass reactants=mass products</em>

mass iron+mass oxygen=mass iron (III) oxide

43.7 g + mass oxygen=62.5 g

mass oxygen = 62.5 - 43.7 = 18.8 g

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3 years ago

2. Make and justify a claim about whether iron rusting when exposed to water vapor is a physical or chemical

Ede4ka [16]

2. Chemical because it can’t change back
3. Physical because it can be changed

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4 years ago

Ions:

kozerog [31]

Chlorine: gain, -1 charge.

iron: lose, +2 charge.

sulfur: 6, gain, -2 charge.

copper: lose, +1 charge.

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3 years ago

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alisha [4.7K]

Answer:

Point one

Explanation:

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What is the Formula mass of potassium chlorate?

guapka [62]

The formula mass of potassium chloride is 122.55 g!

I hope this helped! Mark me Brainliest! :) -Raven❤️

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4 years ago