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2 years ago

Brainliest to whoever gets it correct.

Chemistry

2 answers:

lakkis [162]2 years ago

7 0

Answer:

replacement

Explanation:

here is the ans

Anton [14]2 years ago

5 0

Answer:

$1.replacement \\ \\ It \: is \: a \: single \: replacement \: \\ reaction \: where \: 1 \: atom \: of \: Zinc \ \\ metal \: displaces \: 2 H+ ions \: from \\ the \: hydrochloric \: acid \: to \: form \: \\ hydrogen \: gas \: and \: zinc \: chloride, \\ a \: salt.$

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Which word equation best describes the following formula equation:<br> 4Al + 302 + 2Al2O3?

liberstina [14]

Answer:

Explanation:

The equation is not correctly written, so let's start with that.

4Al + 3O2 ====> 2Al2O3?

Totally correct, including the balance numbers, would be

4moles aluminum + 3 moles Oxygen ===> 2 moles of Aluminum Oxide

Anything else is incomplete.

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olya-2409 [2.1K]

Answer:

The number of Aluminium atoms present in per cubic meter is $N=6.02\times 10^{28}\ atoms/m^3$

Explanation:

Given the density of Aluminium $(\rho )$ is $2.70\ g/cm^3$

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$N=\frac{\rho N_{A}}{A_{Al}}$

Plug the given values in the formula we get,

$N=\frac{2.70\times 6.022\times 10^{23}}{26.98}\\ \\N=0.602\times 10^{23}\ atoms/cm^3\\N=6.02\times 10^{22}\ atoms/cm^3\\N=6.02\times 10^{22}\times10^6\ atoms/m^3$

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3 years ago

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