If you have 6 moles of reactant A and excess of B and C, how much product E would be formed
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1. The molarity of the stock solution of luminol = 1,431 M
2. 0.12 moles of luminol is present in 2.00 L of the diluted spray
3. The volume of the stock solution (Part A) would contain the number of moles present in the diluted solution (Part B): 83.86 ml
<h3>Further explanation</h3>
Stoichiometry in Chemistry studies about chemical reactions mainly emphasizing quantitative, such as the calculation of volume, mass, amount, which is related to the number of ions, molecules, elements, etc.
In stoichiometry included :
- 1. Relative atomic mass
- 2. Relative molecular mass
is the relative atomic mass of the molecule
- 3. mole
1 mole is the number of particles contained in a substance with the same number of atoms in 12 gr C-12
1 mole = 6.02.10²³ particles
While the number of moles can also be obtained by dividing the mass (in grams) by the relative mass of the element or the relative mass of the molecule
Luminol (C₈H₇N₃O₂) is a substance used to detect traces of blood in the scene of a crime because it reacts with iron in the blood
a. a luminol stock solution by adding 19.0g of luminol into a total volume of 75.0mL of H2O.
So the molarity is
- 1. Luminol mole
- the relative molecular mass of Luminol
= 8. C + 7.H + 3.N + 2.16
= 8.12 + 7.1 + 3.14 + 2.16
= 177 grams / mol
so the mole:
mol = gram / relative molecular mass
mole = 0.1073
2. Molarity (M)
M = mole / volume
M = 1,431
- b. luminol concentration in a spray bottle 6.00 × 10⁻² M. So that in 2 L of solution, the number of moles is:
mole = M x volume
mole = 6.10⁻² x 2
mole = 0.12
- c. Molarity of the stock solution (Part A) = 1,431 M
the number of moles present in the diluted solution (Part B) = 0.12
So the volume of the stock solution (Part A) would contain the number of moles present in the diluted solution (Part B) is:
volume = mol / M
volume = 0.08386 L = 83.86 ml
<h3>Learn more</h3>moles of water you can produce
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Keywords: mole, volume, molarity, Luminol, the relative molecular mass
The number of moles of 210 grams of NaHCO₃ is 2.5 moles.
<h3>How to find the Number of moles ? </h3>To calculate the number of moles use the formula
Number of moles =
Mass of NaHCO₃ = 210 g
Now we have to find the Molar mass of NaHCO₃
= Atomic mass of Na + Atomic mass of H + Atomic mass of C + 3 (Atomic mass of O)
= 23 + 1 + 12 + 3 (16)
= 36 + 48
= 84 g/mol
Now put the value in above formula we get
Number of moles =
=
= 2.5 moles
Thus from the above conclusion we can say that The number of moles of 210 grams of NaHCO₃ is 2.5 moles.
Learn more about the Moles here: brainly.com/question/15356425
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