2 years ago

If a decrease in temperature accompanies a reaction, what occurred?

2 answers:

8 0

Released my friending

3 0

Energy was released

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iris [78.8K]

Answer:

I'd Go. B. weigh everything, let the reaction happen, then weigh everything again.

3 0

3 years ago

AveGali [126]

Can u add a link please

4 0

3 years ago

qwelly [4]

Answer:

<u>Oxidation state of Mn = +4</u>

Explanation:

Atomic mass of Mn = 55g/mol

From Faraday's law of electrolysis,

Electrochemical equivalent = $\frac{mass}{charge}$

i.e Z = $\frac{m}{Q}$ = $\frac{0.225g}{1580C}$ = 0.0001424 g/C

But Equivalent weight, E = atomic mass ÷ valency = Z × 96,485

⇒ $\frac{55}{valency}$ = 0.0001424 × 96,485

<u>∴ Valency of Mn = +4</u>

8 0

2 years ago

sdas [7]

Every atom tends to form configuration of noble gas , with the 8 electrons in valence shell.

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3 years ago

pochemuha

If the states of matter have changed such as from solid to liquid, you have to remove or add energy.

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2 years ago