Answer:
Explanation:
Elements in the same family belong to the same group.
A group on the periodic table is the vertical arrangement of elements. Elements in the same group have the same amount of valence electrons in their outermost shell. We know that the valency of an element dictates its chemical properties. In group I for example, elements here have just a valence electron, this makes group I elements readily lose their electrons to achieve a noble configuration.
Physical properties to an extent also varies and progresses down the group steadily.
This is why elements in the same family are said to generally have similar properties
Using the given formula, the density of the material is 2.015 g/mL
<h3>Calculating Density </h3>
From the question, we are to determine the density of the material
From the given formula
Density = Mass / Volume
And from the given information,
Mass = 65.5 g
and volume = 32.5 mL
Putting the parameters into the equation,
Density = 65.5/32.5
Density = 2.015 g/mL
Hence, the density of the material is 2.015 g/mL.
Learn more on Calculating density here: brainly.com/question/24772401
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Chemical reactions are reversible, which means that the reaction that occurs from the reactants to form products can be also from the products to form the reactants again, this is widely studied in Chemical Equilibrium and Le Chantelier's principleons are
<span>Celsius scale: 100 degrees.
Fahrenheit scale: 180 degrees.</span>
The relative volumes of chloroform and water that should be used is 9:10
Concentration of solution in chloroform =
( moles of chloroform )
Concentration of solution in water =
( moles of water )
Dissociation constant at
; ![K_D = 10](https://tex.z-dn.net/?f=K_D%20%3D%2010)
Concentration of solution in chloroform / Concentration of solution in water
Meaning;
![K_D = \frac{\frac{mole\ of\ chloroform}{volume\ of\ chloroform} }{\frac{mole\ of\ water}{volume\ of\ water} }](https://tex.z-dn.net/?f=K_D%20%3D%20%5Cfrac%7B%5Cfrac%7Bmole%5C%20of%5C%20chloroform%7D%7Bvolume%5C%20of%5C%20chloroform%7D%20%7D%7B%5Cfrac%7Bmole%5C%20of%5C%20water%7D%7Bvolume%5C%20of%5C%20water%7D%20%7D)
Since
mole is present in chloroform and
mole is present in water, Total mole of Caffeine present is ![100](https://tex.z-dn.net/?f=100)
Now, we substitute our given values into the equation
![10 = \frac{\frac{90}{volume\ of\ chloroform} }{\frac{10}{volume\ of\ water} }\\\\10 *\frac{10}{volume\ of\ water} = \frac{90}{volume\ of\ chloroform} \\\\\frac{100}{volume\ of\ water} = \frac{90}{volume\ of\ chloroform}\\\\\frac{volume\ of\ chloroform}{volume\ of\ water} = \frac{90}{100}\\\\ \frac{volume\ of\ chloroform}{volume\ of\ water} = \frac{9}{10}\\\\ \frac{volume\ of\ chloroform}{volume\ of\ water} = 9:10](https://tex.z-dn.net/?f=10%20%3D%20%5Cfrac%7B%5Cfrac%7B90%7D%7Bvolume%5C%20of%5C%20chloroform%7D%20%7D%7B%5Cfrac%7B10%7D%7Bvolume%5C%20of%5C%20water%7D%20%7D%5C%5C%5C%5C10%20%2A%5Cfrac%7B10%7D%7Bvolume%5C%20of%5C%20water%7D%20%3D%20%5Cfrac%7B90%7D%7Bvolume%5C%20of%5C%20chloroform%7D%20%20%5C%5C%5C%5C%5Cfrac%7B100%7D%7Bvolume%5C%20of%5C%20water%7D%20%3D%20%5Cfrac%7B90%7D%7Bvolume%5C%20of%5C%20chloroform%7D%5C%5C%5C%5C%5Cfrac%7Bvolume%5C%20of%5C%20chloroform%7D%7Bvolume%5C%20of%5C%20water%7D%20%3D%20%5Cfrac%7B90%7D%7B100%7D%5C%5C%5C%5C%20%5Cfrac%7Bvolume%5C%20of%5C%20chloroform%7D%7Bvolume%5C%20of%5C%20water%7D%20%3D%20%5Cfrac%7B9%7D%7B10%7D%5C%5C%5C%5C%20%5Cfrac%7Bvolume%5C%20of%5C%20chloroform%7D%7Bvolume%5C%20of%5C%20water%7D%20%3D%209%3A10)
Therefore, the relative volumes of chloroform and water that should be used is 9:10
Learn more; brainly.com/question/11060225