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3 years ago

Which statement correctly describes diamond and graphite, which are different forms of solid carbon?

Chemistry

2 answers:

alukav5142 [94]3 years ago

8 0

Answer: Option (3) is the correct answer.

Explanation:

When an element exists in two or more different physical forms then they are known as allotropes.

For example, diamond and graphite are both allotropes of carbon.

In graphite, carbon atoms are joined together in sheets of six sided lattice. Whereas in diamond, carbon atoms are joined together in four cornered lattice.

Therefore, as these allotropes are made up of same element so they have similar chemical properties but different physical properties like melting point, boiling point etc.

Also, both of them have different molecular structure.

Thus, we can conclude that the statement the differ in their molecular structure and properties correctly describes diamond and graphite.

mart [117]3 years ago

5 0

They differ in their molecular structures and properties.

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What do Potassium and Krypton have in common and what are their differences based on their location on the periodic table?

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“Potassium (K) and Krypton (Kr) are in the same period, so they have the same number of electron shells. Krypton is more reactive than Potassium because it has a full outer shell” is <em>incorrect </em>because having a full outer shell means that the element is unreactive.

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1. K is in Group 1 and Kr is in Group 18.

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3 years ago

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3 years ago

I need help with number 8 please help ASAP.

Rzqust [24]

Answer:

33.33% = 33%

Explanation:

MgCO3(s) + 2HCl (aq) --> MgCl2(aq) + H20(l) + CO2(g)

1 mole of MCO3 will produce → 1 mole of CO2

We need to get the number of mole of CO2:

and when we have 0.22 g of CO2, so number of mole = mass / molar mass

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