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jade611135
22.06.2019 •
Chemistry
For the reaction shown, calculate how many moles of no2 form when each of the following completely reacts. 2n2o5(g)→4no2(g)+o2(g) part a 1.0 mol n2o5 express your answer using two significant figures. nothing mol m o l request answer part b 5.4 mol n2o5 express your answer using two significant figures.
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Ответ:
For part A: The number of moles of
is 2.0 moles.
For part B: The number of moles of
is
moles.
Explanation:
For the given chemical equation:
![2N_2O_5(g)\rightarrow 4NO_2(g)+O_2(g)](/tpl/images/0004/6875/6df3b.png)
For Part A: When 1.0 mole ofBy Stoichiometry of the reaction:
2 moles of
produces 4 moles of ![NO_2](/tpl/images/0004/6875/01e3a.png)
So, 1.0 moles of
will produce =
of ![NO_2](/tpl/images/0004/6875/01e3a.png)
Hence, the number of moles of
expressed in two significant figures are 2.0 moles.
For Part B: When 5.4 moles ofBy Stoichiometry of the reaction:
2 moles of
produces 4 moles of ![NO_2](/tpl/images/0004/6875/01e3a.png)
So, 5.4 moles of
will produce =
of ![NO_2](/tpl/images/0004/6875/01e3a.png)
To express it in two significant figures, we round this value of 10.8 mol to 11 mole and then express it in scientific notation.
Scientific notation is defined as the way of representing a number which have very large value or very small value and is written in the decimal form.
Hence, the number of moles of
expressed in two significant figures are
moles.
Ответ:
16
Step-by-step explanation:
divide the two numbers