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Lena [83]
3 years ago
8

3. Calculate the amount of sodium carbonate required to neutralize 50 cc of N-H2SO4.​

Chemistry
1 answer:
zlopas [31]3 years ago
6 0

Answer:

234567890

Explanation:

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If 12.5 grams of the original sample of cesium-137 remained after 90.6 years, what was the mass of the original sample?
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Mass of original sample = 100 g

Explanation:

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So,  

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k=\frac{\ln2}{30.17}\ year^{-1}

The rate constant, k = 0.02297 year⁻¹

Time = 90.6 years

Using integrated rate law for first order kinetics as:

[A_t]=[A_0]e^{-kt}

Where,  

[A_t] is the concentration at time t

[A_0] is the initial concentration

Initial concentration [A_0] = ?

Final concentration [A_t] = 12.5 grams

Applying in the above equation, we get that:-

12.5\ g=[A_0]e^{-0.02297\times 90.6}

[A_0]=\frac{12.5}{e^{-0.02297\times 90.6}}\ g=100\ g

<u>Mass of original sample = 100 g</u>

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