3 years ago

An atom of nitrogen has seven electrons. Which diagram correctly respresents the arrangement of these electrons?

Chemistry

1 answer:

Studentka2010 [4]3 years ago

4 0

Answer:

Its B I just took the test and got a 100%

Explanation:

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Which substance is a base? HCOOH RbOH H2CO3 NaNO3

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Answer:

RbOH

Explanation:

For this question, we have to remember what is the definition of a base. A base is a compound that has the ability to produce hydroxyl ions $OH^-$ , so:

$AOH~->~A^+~+~OH^-$

With this in mind we can write the reaction for each substance:

$HCOOH~->~HCOO^-~+~H^+$

$RbOH~->~Rb^+~+~OH^-$

$H_2CO_3~->~CO_3^-^2~+~2H^+$

$NaNO_3~->~Na^+~+~NO_3^-$

The only compound that fits with the definition is $RbOH$ , so this is our base.

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Answer:

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