Answer:
<u>structural arrangements</u>
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<h2>properties of daimond: </h2><h3>appearance: transparent</h3><h3>hardness: very hard</h3><h3>thermal conductivity :very poor</h3><h3>electric conductivity: poor</h3><h3>density:</h3>
<h3>uses: jewellery and drilling</h3>
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<h2>properties of graphite:</h2>
<h3>appearance: black shiny</h3><h3>hardness: soft ,slippery to touch</h3><h3>thermal conductivity : moderate</h3><h3>electric conductivity: good</h3><h3>density:</h3>
<h3>uses:dry cell, electric arc, pencil lead, lubricant</h3>
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<h2>How Diamond and Graphite are chemically identical?</h2>
- On heating diamond or graphite in the air, they burn completely to form carbon dioxide.
- - Equal quantities of diamond and graphite when burned, produce exactly the same amount of carbon dioxide.
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<h2>Why the physical properties of diamond and graphite are so different?</h2>
Due to the difference in the arrangement of carbon atoms in diamond and graphite
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<h2>
<em><u>hope</u></em><em><u> it</u></em><em><u> helps</u></em><em><u> you</u></em><em><u><</u></em><em><u>3</u></em></h2>
Taking into account the definition of molarity, the molarity of a solution prepared by dissolving 0.2 mol sucrose in enough water to make a 100 mL solution is 2 
.
<h3>Definition of molarity</h3>
Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.
The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:
Molarity is expressed in units .
<h3>Molarity in this case</h3>
In this case, you have:
- number of moles= 0.2 moles
- volume= 100 mL= 0.1 L
Replacing in the definition of molarity:
Solving:
<u><em>molarity= 2 </em></u>
Finally, the molarity of a solution prepared by dissolving 0.2 mol sucrose in enough water to make a 100 mL solution is 2 .
Learn more about molarity:
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<span>plagioclase feldspars have striations and potassium feldspars don't have striations</span>
Answer:
false; the purpose of antibiotics is to kill bacteria
Explanation:
Answer:
Empirical formula is C₉H₁₅O
Molecular formula = C₈₁H₁₃₅O
₉
Explanation:
Percentage of carbon = 77.60%
Percentage of oxygen = 11.45%
Percentage of hydrogen = 10.95%
Molecular weight = 1253 g/mol
Molecular formula = ?
Empirical formula = ?
Solution:
Number of gram atoms of C = 77.60 g /12g/mol =6.5
Number of gram atoms of O = 11.45 g / 16 g/mol = 0.72
Number of gram atoms of H = 10.95 g / 1.008 g/mol= 10.9
Atomic ratio:
C : H : O
6.5/0.72 : 10.9/0.72 : 0.72/0.72
9 : 15 : 1
C : H : O = 9 : 15 : 1
Empirical formula is C₉H₁₅O
Molecular formula:
Molecular formula = n (empirical formula)
n = molar mass of compound / empirical formula mass
n = 1253 / 139
n = 9
Molecular formula = n (empirical formula)
Molecular formula = 9 (C₉H₁₅O
)
Molecular formula = C₈₁H₁₃₅O
₉
