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poizon [28]
3 years ago
11

2. Explain why atoms of the same element are not all identical.

Chemistry
1 answer:
GarryVolchara [31]3 years ago
6 0
They are not always identical because they have different isotope numbers which develops different neutrons numbers
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A buffer solution contains 0.368 M hydrocyanic acid and 0.360 M potassium cyanide . If 0.0513 moles of sodium hydroxide are adde
MrRa [10]

Solution :

Millimoles of hydrocyanic acid = 225 x 0.368

                                                   = 82.8

Millimoles of potassium cyanide = 225 x 0.360

                                                   = 81

Millimoles of sodium hydroxide = 51.3

Therefore,

pOH = pKb + log [salt - C / bas + C]

        = 4.74 + log[82.8 - 51.3 / 81 + 51.3]

         = 4.102

Therefore, pH = 9.05

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3 years ago
How can u describes a true solution?
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3 years ago
100 points plus i'll mark brainliest
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I think the answer is 98 grams
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