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shutvik [7]
2 years ago
11

Which of the following properties tells the most about the stability of a metal?

Chemistry
2 answers:
bearhunter [10]2 years ago
7 0
I believe the answer is A
Colt1911 [192]2 years ago
6 0

Answer: B Electronegativity

(A-p-e-x)

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Oceanic crust is more dense because it contains basalt which is more dense than granite which composes the continental crust.
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2 years ago
Which equation shows how to solve for enthalpy of solution based on the information in tables?​
Tatiana [17]

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2 years ago
In metallic bonds, the mobile electrons surrounding the positive ions are called a(n)?
Anastaziya [24]

Answer: In metallic bonds, the mobile electrons surrounding the positive ions are called <u><em>dipole</em></u>.

6 0
3 years ago
What is the pH of a mixture of 0.042 M NaH2PO4 and 0.058 M Na2HPO4? Hint: The pKa of phosphate is 6.86.
AlekseyPX

Answer:

The pH value of the mixture will be 7.00

Explanation:

Mono and disodium hydrogen phosphate mixture act as a buffer to maintain pH value around 7. Henderson–Hasselbalch equation is used to determine the pH value of a buffer mixture, which is mathematically expressed as,

pH=pK_{a} + log(\frac{[Base]}{[Acid]})

According to the given conditions, the equation will become as follow

pH=pK_{a} + log(\frac{[Na_{2}HPO_{4} ]}{[NaH_{2}PO_{4}]})

The base and acid are assigned by observing the pKa values of both the compounds; smaller value means more acidic. NaH₂PO₄ has a pKa value of 6.86, while Na₂HPO₄ has a pKa value of 12.32 (not given, but it's a constant). Another more easy way is to the count the acidic hydrogen in the molecular formula; the compound with more acidic hydrogens will be assigned acidic and vice versa.

Placing all the given data we obtain,

pH=6.86 + log(\frac{0.058}{0.042})

pH=7.00

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3 years ago
If calcium has two valence electrons and fluorine has seven, how many fluorine atoms are needed to form an ionic bond with calci
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Fluorine needs one electron to fill its orbital shell. It needs 8 valence electrons
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