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sergij07 [2.7K]
4 years ago
15

someone help PLSSSS. i’ve asked this question like 3 times already Determine the number of lone pair electrons on each H in NH3.

Z of N= 7, H=1 A. 0 B. 3 C. 1 D. 2

Chemistry
1 answer:
dimaraw [331]4 years ago
6 0

Answer:

The answer is option B.

3.

Hope this helps you

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Answer: pH of resulting solution will be 13

Explanation:

pH is the measure of acidity or alkalinity of a solution.

Moles of H^+ ion = Molarity\times {\text {Volume in L}}=1M\times 0.01L=0.01mol

Moles of OH^- ion = Molarity\times {\text {Volume in L}}=1.2M\times 0.01L=0.012mol

HCl+NaOH\rightarrow NaCl+H_2O

For neutralization:

1 mole of H^+ ion will react with 1 mole of OH^- ion

0.01 mol of H^+  ion will react with =\frac{1}{1}\times 0.01mole of OH^- ion

Thus (0.012-0.01)= 0.002 moles of OH^- are left in 20 ml or 0.02 L of solution.

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pOH=-log[0.1]=1

pH+pOH=14

pH=14-1=13

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3 years ago
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Kernel structure for manganese
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The nucleus consists of 25 protons (red) and 30 neutrons (blue). 25 electrons (green) bind to the nucleus, successively occupying available electron shells (rings). Manganese is a transition metal in group 7, period 4, and the d-block of the periodic table. It has a melting point of 1246 degrees Celsius.

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