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JulsSmile [24]
3 years ago
9

An atom has 20 protons, 26 neutrons, and 20 electrons. what could be the atomic mass of this atom?

Chemistry
1 answer:
Elanso [62]3 years ago
7 0
46 is the answer. because if you add 26 and 20 that is the mass
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Hydrogen iodide decomposes slowly to H2 and I2 at 600 K. The reaction is second order in HI, and the rate constant is 9.7×10−6M−
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Explanation :

The integrated rate law equation for second order reaction follows:

k=\frac{1}{t}\left (\frac{1}{[A]}-\frac{1}{[A]_o}\right)

where,

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Now put all the given values in above equation, we get:

9.7\times 10^{-6}=\frac{1}{5.00}\left (\frac{1}{[A]}-\frac{1}{(0.110)}\right)

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Hence, the molarity after a reaction time of 5.00 days is, 0.109 M

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