Answer:
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Explanation:
Since the n^2/Z values are same for second orbit of Be^3+<span> and first orbit of H, their radii are also equal. Answer is option A.
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Answer:
To make 100 mL of a solution 100mM of acetic acid you need to add 0,57 mL of glacial acetic acid and mix with 99,43 mL of H₂O
Explanation:
Molarity is a way to express concentration in a solution, in units of moles of solute per liter of solution.
To know how to do 100 mL of a solution 100mM of acetic acid it is necessary to know, first, the moles of this substance with the desired volume and concentration , thus:
0,100 L × = <em>0,0100 moles of acetic acid</em>
These moles are obtained from glacial acetic acid. Thus, it is necessary to convert these moles to grams with molar weight and then to mililiters with density:
<em>0,0100 moles × × = </em><em>0,57 mL of glacial acetic acid</em>
Thus, to make 100 mL of a solution 100mM of acetic acid you need to add 0,57 mL of glacial acetic acid and mix with 99,43 mL of H₂O <em>-The necessary to obtain 100 mL-</em>
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