How many grams of aluminum will be required to produce 4.5 g of copper metal?

Mass of aluminum required is 1.277 grams

Explanation:

the reaction between copper and aluminium is a redox reaction and this can be written as:

Thus we need two moles of aluminum to reduce or to produce three moles of copper metal.

The moles of copper need to produce

=

These will produced from = of aluminum

The mass of aluminum required = moles X atomic mass = 0.0473X27=1.277g

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

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