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3 years ago

Which term describes the composition of matter shown in figure A

Chemistry

1 answer:

bija089 [108]3 years ago

4 0

Answer:

The answer to your question is Element

Explanation:

Element is a substance whose atoms are all the same because of all the atoms

have the same number of protons, neutrons and, electrons.

Compound is a substance formed when 2 or more atoms combined.

Mixture is a substance formed by 2 or more different kinds of atoms or

compounds.

Phase is a state of matter like solid, liquid or gas.

According to the definitions, we conclude that the figure is an Element.

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How many grams of zinc would be required to produce 9.65g of zinc hydroxide

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The question is incomplete, here is the complete question:

How many grams of zinc would be required to produce 9.65g of zinc hydroxide

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Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ .....(1)

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Molar mass of zinc hydroxide = 99.4 g/mol

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By Stoichiometry of the reaction:

1 mole of zinc hydroxide is produced from 1 mole of zinc

So, 0.0971 moles of zinc hydroxide will be produced from = $\frac{1}{1}\times 0.0971=0.0971mol$ of zinc

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Molar mass of zinc = 65.4 g/mol

Moles of zinc = 0.0971 moles

Putting values in equation 1, we get:

$0.0971mol=\frac{\text{Mass of zinc}}{65.4g/mol}\\\\\text{Mass of zinc}=(0.0971mol\times 65.4g/mol)=6.35g$

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