3 years ago

In metallic bonds, the mobile electrons surrounding the positive ions are called a(n)

Chemistry

1 answer:

creativ13 [48]3 years ago

5 0

It is called, Noble gas

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Magnesium reacts steadily with hydrochloric acid

balu736 [363]

Magnesium + Hydrocloric acid -> Magnesium chloride + hydrogen

You can observe a single displacement reaction

"Describe to show that the has formed is hydrogen"

I don't know what you mean. I can show the chemical equation though.

Mg(s) + 2 HCl(aq) --> MgCl 2(aq) + H 2(g)

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3 years ago

Si la eficiencia de una máquina de calor es del 50% significa que ?

Karolina [17]

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No toques el link

Explanation:

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2 years ago

PLS help

viktelen [127]

Answer:

d . Sc2O5

Explanation:

Hello,

In this case, when forming oxides from a metal and oxygen, for us to find out each element's subscript, we must exchange them as shown below, considering +5 for scandium:

$Sc^{+5}_2O^{-2}_5$

For that reason, the answer is d . Sc2O5

Best regards.

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AleksandrR [38]

It is a trial aimed to reduce bias during an experiment. An example would be a sugar pill, something that has no real effect so that the results of the true trial can accurately be compared. Its like a control group.

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3 years ago

Which one of these is NOT a sign of chemical change? *

Gekata [30.6K]

I think it’s light
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