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MissTica
4 years ago
5

Which of these best describes a scientific model?

Chemistry
1 answer:
goblinko [34]4 years ago
3 0
The answer a way of explaining a complex concept.
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What is the percent yield of NH3 if the reaction of 26.3 g of H2 produces 79.0 g of NH3?
Anvisha [2.4K]

Answer:

\boxed{\text{53.3 \%}}

Explanation:

MM:           2.016      17.03

           N₂ + 3H₂ ⟶ 2NH3

m/g:            26.3  

1. Theoretical yield

(a) Moles of H₂

\text{Moles of H${_2}$} = \text{26.3 g H${_2}$} \times \dfrac{\text{1 mol H${_2}$}}{\text{2.016 g H${_2}$}} = \text{13.05 mol H${_2}$}

(b) Moles of NH₃

\text{Moles of NH${_3}$} = \text{13.05 mol H${_2}$} \times \dfrac{\text{2 mol NH${_3}$}}{\text{3 mol H${_2}$}} = \text{8.697 mol NH${_3}$}

(c) Theoretical yield of NH₃

\text{Mass of NH${_3}$} = \text{8.967 mol NH${_3}$} \times \dfrac{\text{17.03 g NH${_3}$}}{\text{1 mol NH${_3}$}} = \text{148.1 g NH${_3}$}

(d) Percent yield

\text{Percent yield} = \dfrac{\text{ actual yield}}{\text{ theoretical yield}} \times 100 \% = \dfrac{\text{79.0 g}}{\text{148.1 g}} \times 100 \% = \textbf{53.3 \%}\\\\\text{The percent yield is }\boxed{\textbf{53.3 \%}}

7 0
3 years ago
Read 2 more answers
Name a non metal which conducts electricity
Nuetrik [128]

Answer:

Graphite

Graphite is a non-metal and it is the only non-metal that can conduct electricity.

8 0
2 years ago
4. Which statement is true about alkali metals?
Svet_ta [14]
I think its most likely to be A,
8 0
4 years ago
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What is the apparent charge on the chlorine atom in the molecule hcl?
wariber [46]

I believe Cl (chlorine) would have a -1 charge since H tends to have a +1 charge.


Hope this helps!!! :)

7 0
3 years ago
If a rock is thrown 0.8 meters into the air, How fast was it thrown
sergiy2304 [10]
V=0 m/s, u=?, a = 9.8 m/s² and s = 0.8 m
u²=2×9.8×0.8=15.68
<span>u=3.959 ≈ 3.96 m/s

</span>
3 0
3 years ago
Read 2 more answers
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