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3 years ago

An element has 13 protons in its nucleus. What is its atomic number?

Chemistry

2 answers:

Dafna11 [192]3 years ago

6 0

Answer:

The answer is 13.

Explanation:

In an element, proton number is also define as atomic number. So if the element has 13 protons, it's atomic number will be 13.

-BARSIC- [3]3 years ago

6 0

Atom has 13 protons

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Given:

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Mass of nitrogen oxide produced = 1500 kg

The given chemical equation of nitrogen oxide is:

$\rm 2 NO + O_2 \rightarrow 2 NO_2$

Now, to calculate the percentage yield, the following conversion factor should be used:

$\rm 1500\; kg \;NO \times \dfrac{1000 \;g\; NO}{1\; kg \;NO}\times\dfrac {1 \;mol \;NO}{30\; g \;NO}\times\dfrac {2 \;mol \;NO_2}{2 \;mol \;NO}\times\dfrac {46 \;g \;NO_2}{1 \;mol \;NO_2}\times\dfrac {1 \;kg}{1000 \;g}$

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The percentage yield will be:

$\rm Percentage Yield = \dfrac{Actual \; Yield}{Expected \;Yield}\times 100\\\\\\
\rm Percentage Yield = \dfrac{2500\;kg}{2300\;kg}\times 100\\$

Percentage yield = 65.2 %

Thus, the percentage yield of nitrogen dioxide is 65.2%.

Learn more about <u>percentage yield </u>here:

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