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notsponge [240]
3 years ago
12

Ammonium nitrate decomposes to dinitrogen monoxide and water. If given 45.7 grams of ammonium

Chemistry
1 answer:
statuscvo [17]3 years ago
8 0

Answer:

20.54 g of H₂O

Explanation:

Since you already have a balanced equation, the next step is to see the ratio between the ammonium nitrate and water in the equation:

NH4NO3(s)—N2O(g)+2H2O

1 mole of ammonium nitrate produces 2 moles of H2O

So we have the ration:

\dfrac{1\;mole\;of\;NH_4NO_3}{2\;moles\;of\;H_{2}O}

Let's leave that for later use.

Next step is to covert the mass given into moles. We do that by getting the molar mass of the given and using that as a conversion factor:

Element   number of                 molar mass

                   atoms                  of each element          

N =                  2              x            14.01 g/mole   =      28.02 g/mole

H =                  4              x              1.01 g/mole   =        4.01  g/mole

O =                  3              x            16.00 g/mole =      <u>48.00 g/mole </u>

                                                                                    80 .03 g/mole

Now we can convert:

45.7g\;of\;NH_4NO_3\times\dfrac{1\;of\;NH_4NO_3}{80.03\;g\;of\;NH_4NO_3}=0.57\;moles\;of\;NH_4NO_3

Now we can use this to determine how many moles of H2O this would produce by using the ration we solved for earlier.

0.57\;moles\;of\;NH_4NO_3\times\dfrac{2\;moles\;of\;H_{2}O}{1\;mole\;of\;NH_4NO_3} =1.14\;moles\;of\;H_{2}O

And we convert that by getting the molecular mass of H2O, which is 18.02 g/mole:

1.14\;moles\;of\;H_{2}O\times\dfrac{18.02\;g\;of\;H_{2}O}{1\;\;mole\;of\;H_{2}O} =20.54\;g\;of\;H_{2}O

But this is only if the whole 45.7 g of ammonium nitrate is used up.

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