Answer:
Explanation:
1 mol of Mg = 6.02 * 10^23 ions of magnesium
x = 1.25 * 10^23 ions of magnesium
1/x = 6.02 * 10^23/1.25 * 10^23 Cross multiply
x*6.02 * 10^23 = 1 * 1.23 * 10^23 Divide by 6.02*10^23
x = 1.25 * 10^23 / 6.02*10^23
x = 0.208 mols
Due to its bigger size compared to bromide ions, iodide ions have a poorer charge-to-volume ratio.
Iodide ion has a lower ratio of charge to volume because iodine is bigger and has the same charge as both other ions. Ca ions have a lower ratio of charge to volume than Sc ions because they are larger in size and have less charge than Sc ions. Due to its bigger size compared to potassium ions, bromide ions have a poorer charge-to-volume ratio. Sulfate ions have a larger charge density than ClO4 ions do because sulfate ions have more charge than ClO4 ions do.
Learn more about Iodide ion here-brainly.com/question/20533826
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Volume = V = 250ml = 0.25 L
<span>M = 0.135M </span>
<span>Molar mass of AgNO3 = 108+14+3*16 = 170 </span>
<span>M = mole/V </span>
<span>mole = 0.135*0.25 = 0.03375 mole </span>
<span>mole = mass/molar mass </span>
<span>mass = 0.03375 * 170 = 5.7375 gr</span>
Answer:
CH₃CO₂H + H₂O ⇄ CH₃CO₂⁻ + H₃O⁺
Explanation:
A buffer is defined as the mixture of a weak acid and its conjugate base or vice versa.
For the acetic acid buffer, CH₃CO₂H is the weak acid and its conjugate base is the ion without H⁺, that is CH₃CO₂⁻. The equilibrium equation in water knowing this is:
<h3>CH₃CO₂H + H₂O ⇄ CH₃CO₂⁻ + H₃O⁺</h3>
<em>In the equilibrium, the acid is dissociated in the conjugate base and the hydronium ion.</em>
Answer:
The answer to your question is letter B.
Explanation:
Data
Polonium-208 half-life = 2.9 years
Original sample = 2 mg
Total time = 8 years
Process
Mass Time
2 mg 0 years
1 mg 2.9 years
0.5 mg 5.8 years
0.25 mg 8.7 years
The mass of sample must be between 0.5 and 0.25 mg, from the options given the only possible answer is<u> letter B 0.296 mg</u>