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never [62]
3 years ago
5

Please help Sodium (Na) has an atomic number of 11 and an atomic mass of 23. Which of the following correctly shows the electron

arrangement for sodium?
2, 9 2, 8, 1 2, 8, 2 2, 9, 1
Chemistry
1 answer:
fredd [130]3 years ago
3 0
2,8,1
It's in group 1, so its outershell only has 1 electron, and the other shells are completely filled, so 2 then 8. :)
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Single replacement or single displacement reactions

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In a single replacement or displacement reaction, the activity series is useful in predicting whether the reaction will take place or not.

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liquid octane(CH3)(CH2)6CH3) reacts with gaseous oxygen gas(O2) to produce gaseous carbon dioxide(CO2) and gaseous water(H2O). I
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<h3>Percent yield</h3>

First, let's look at the equation of the reaction:

2C_8H_1_8 + 25O_2 -- > 16CO_2 + 18H_2O

The mole ratio of octane to oxygen is 2:25.

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Percent yield of carbon dioxide = 5.18/10.5624 = 49.0 %

More on percent yield can be found here: brainly.com/question/17042787

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