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romanna [79]
3 years ago
11

The cullinan diamond was the largest natural diamond ever found (January 25 1905 ). It weighed 3104 carat (1 carat =

Chemistry
1 answer:
bazaltina [42]3 years ago
5 0

Answer:

3.1\times 10^{25} carbon atoms are present in stone

Explanation:

Diamond is made of carbon only.

1 mg = 0.001 g

1 carat = 200 mg

So, weight of diamond in grams = (3104\times 200\times 0.001)g = 620.8 g

Molar mass of carbon = 12 g/mol

So, number of moles of carbon in diamond is the ratio of diamond to molar mass of carbon.

So, number of moles of carbon in diamond = \frac{620.8}{12}moles

1 mol of an atom = 6.023\times 10^{23} number of atoms

So, \frac{620.8}{12}moles of carbon atom = \frac{620.8}{12}\times 6.023\times 10^{23} carbon atoms = 3.1\times 10^{25} carbon atoms.

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Please helppp I need 1 paragraph I’m about to go to school
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The data on Climate change is as explained below-

Explanation:

Climate change is the ominous “hard truth” concurrently. However, it is not the first time that climate change is happening. In geological history, we find plenty of evidence of climate change.  

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The present climate change is fuelled by anthropogenic activities at large. Large scale emission of greenhouse gases possibly from burning of fossil fuels ever since the Industrial revolutions in the late 18th century has altered the chemical composition of atmospheric gases. In addition to the use of fossil fuels other activities such as agriculture, coal-based power plants, deforestation and other such activities have been instrumental in degrading the serene balance between different atmospheric gases.

The evidence of the present climate change can be gauged in-

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3 0
3 years ago
What aqueous solution has the highest boiling point at standard pressure? A) 1.0 M KCl(aq) B) 1.0 M CaCl2(aq) C) 2.0 M KCl(aq) D
Lapatulllka [165]
The increase in the boiling point of a solvent is a colligative property.


That means that the increase in the boling point will be related to the number of particles (molecules or ions) present in the solution.


The higher the number of particles (molecules or ions) the higher the increase in the boiling point.


All the aqueous solutions presented are electrolytes, i.e. the solutes are ionic compounds.


Then, you have to compare the number of ions that you have in each solution.


A) 1.0 M KCl ---> 1.0 M K+     +      1.0 MCl-    = 2 moles of particles / liter


B) 1.0 M CaCl2 --> 1.0M Ca(2+)      +      1.0M * 2 Cl (-)    = 3 moles of particle / liter


C) 2.0M KCl ---> 2.0 M K+      +      2.0 M Cl-  = 4 moles of particle / liter


D) 2.0 M CaCl2 ----> 2.0 M Ca (2+)      + 2.0M * 2 Cl (-)  = 6 moles of particle / liter.


Then, the solution 2.0M CaCl2(aq) has the highest increase in the boiling point.


Answer: option D) 2.0 M Ca Cl2(aq)
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