The nucleus of the atom contains the greatest concentration of mass of an atom. which arrow is pointing at the nucleus of nitrog
en?
1 answer:
The nucleus of an atom of any element is located at the very center. It contains subatomic particles, proton and neutron. That's why it contains the greater mass, because only the electrons orbit the nucleus. So, you would expect the arrow to point somewhere in the center. A picture of nitrogen's nucleus is shown in the attached picture.
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This is an incomplete question, here is a complete question.
A weighed amount of sodium chloride is completely dissolved in a measured volume of 4.00 M ammonia solution at ice temperature, and carbon dioxide is bubbled in. Assume that sodium bicarbonate is formed util the limiting reagent is entirely used up. the solubility of sodium bicarbonate in water at ice temperature is 0.75 mol per liter. Also assume that all the sodium bicarbonate precipitated is collected and converted quantitatively to sodium carbonate.
Data to be used for calculating the results
-The mass of sodium chloride in (g) is 14.19
-The volume of ammonia solution in (mL) is 36.15
Calculate the following: What is the theoretical yield of sodium bicarbonate in grams?
Answer : The theoretical yield of sodium bicarbonate in grams is, 20.4 grams.
Explanation :
First we have to calculate the moles of NaCl and .
Now we have to calculate the limiting and excess reagent.
The balanced chemical reaction will be:
From the balanced reaction we conclude that
As, 1 mole of react with 1 mole of
So, 0.243 mole of react with 0.243 mole of
From this we conclude that, is an excess reagent because the given moles are greater than the required moles and
is a limiting reagent and it limits the formation of product.
Now we have to calculate the moles of
From the reaction, we conclude that
As, 1 mole of react to give 1 mole of
So, 0.243 moles of react to give 0.243 moles of
Now we have to calculate the mass of
Molar mass of sodium bicarbonate = 84 g/mol
Thus, the theoretical yield of sodium bicarbonate in grams is, 20.4 grams.