NEEDS TO BE CORRECT EXPLAIN!!!!! I'M GIVING 50 POINTS!!!!!!!

2 answers:

7 0

In an ammonia solution (NH4OH):
The number of nitrogen (N) atoms is 1
The number of hydrogen (H) atoms is 5 (the H4 AND the H)
The number of oxygen (O) atoms is 1
So, there are 3 different TYPES of element, but 7 atoms altogether in this compound.
However if you are referring to ammonia on its own, there are 4 atoms as ammonia is written as NH3, so has 1 nitrogen atom and 3 hydrogen atoms

Minchanka [31]3 years ago

5 0

Hello there,

Ammonia will have a total of 4 atoms.

Hope I helped :)

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The heat of combustion of ethane is -337.0kcal at 25 degrees celsius. what is the heat of the reaction when 3g of ethane is burn

Ghella [55]

Answer:

Q = -33.6kcal .

Explanation:

Hello there!

In this case, according to the equation for the calculation of the total heat of reaction when a fixed mass of a fuel like ethane is burnt, we can write:

$Q=n*\Delta _cH$

Whereas n stands for the moles and the other term for the enthalpy of combustion. Thus, for the required total heat of reaction, we first compute the moles of ethane in 3 g as shown below:

$n=3g*\frac{1mol}{30.08g}=0.1mol$