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bogdanovich [222]
4 years ago
6

" what is the total positive charge the protons have together ? " how do I tell?? Please help!!!

Chemistry
1 answer:
zzz [600]4 years ago
8 0
To calculate this, the first step is to determine the number of protons in each atom of the ion. You can use their atomic number to find the number of protons. If the number protons and electrons are equal there is no charge, so the next step is to determine how many electrons to add or remove to the number of protons.
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The rate constant for a certain reaction is k = 4.50×10−3 s−1 . If the initial reactant concentration was 0.400 M, what will the
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<u>Answer:</u> The concentration of reactant after the given time is 0.0205 M

<u>Explanation:</u>

Rate law expression for first order kinetics is given by the equation:

k=\frac{2.303}{t}\log\frac{[A_o]}{[A]}

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k = rate constant  = 4.50\times 10^{-3}s^{-1}

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Putting values in above equation, we get:

4.50\times 10^{-3}s^{-1}=\frac{2.303}{660s}\log\frac{0.400}{[A]}

[A]=0.0205M

Hence, the concentration of reactant after the given time is 0.0205 M

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