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Harrizon [31]
3 years ago
13

Gold and helium are examples of a(n)

Chemistry
1 answer:
kogti [31]3 years ago
4 0
I guess examples of solid and gas???? You have to be more descriptive.....
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Azurite, 2 CuCO3 * Cu(OH)2 is blue and malachite, CuCO3 * Cu(OH)2 is green. Which contains the higher percentage of copper? Each
blagie [28]

Answer:

Malachite green has highest percentage of copper.

Explanation:

Azurite: 2CuCO_3.Cu(OH)_2

Molar mass of Azurite = M = 344.67 g/mol

Atomic mass of copper = 63.55 g/mol

Percentage of copper in Azurite :

Cu\%=\frac{3\times 63.55 g/mol}{344.67 g/mol}\times 100=55.31\%

The percentage of copper in an azurite is 55.31%.

Malachite: CuCO_3.Cu(OH)_2

Molar mass of Malachite = M = 221.12 g/mol

Atomic mass of copper = 63.55 g/mol

Percentage of copper in Malachite:

Cu\%=\frac{2\times 63.55 g/mol}{221.12 g/mol}\times 100=57.48\%

The percentage of copper in an malachite is 57.48%.

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How is an ionic compound formed
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False..........

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What is my skeletal system made of
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Explanation:

Image result for Explain in detail the sub-atomic particles in a atom

Subatomic particles include electrons, the negatively charged, almost massless particles that nevertheless account for most of the size of the atom, and they include the heavier building blocks of the small but very dense nucleus of the atom, the positively charged protons and the electrically neutral neutrons.

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