3 years ago

How can you remove energy from matter?

1 answer:

7 0

Answer:

you can remove energy from the matter by lowering its temperature

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gayaneshka [121]

Answer: 1.77 kg of manganese (IV) oxide reacts to produce 1.12kg of manganese metal.

Explanation:

The balanced chemical equation is:

$4Al+3MnO_2\rightarrow 2Al_2O_3+3Mn$

To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}$

moles of manganese = $\frac{1.12\times 1000g}{55g/mol}=20.4mol$

According to stoichiometry :

3 moles of $Mn$ is produced by = 3 moles of $MnO_2$

Thus 20.4 moles of $Mn$ is produced by = $\frac{3}{3}\times 20.4=20.4moles$ of $MnO_2$

Mass of $MnO_2=moles\times {\text {Molar mass}}=20.4moles\times 86.9g/mol=1773g=1.773kg$ (1kg=1000g)

Thus 1.77 kg of manganese (IV) oxide reacts to produce 1.12kg of manganese metal.

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3 years ago

Jobisdone [24]

121.75 is really really really really really the right answer... For real

7 0

3 years ago

elena55 [62]

What occurs is they neutralize both acid and base characteristics/features, usually producing a salt.

Hope this shells!

5 0

2 years ago

hoa [83]

Answer:

126,720 inches

Explanation:

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3 years ago

galben [10]

Has 9 protons and 9 electrons in per atom.........

3 0

4 years ago