Considering the definition of molarity, 4.02 liters of ammonium sulfate are created if 17.3 moles of solute are dissolved to make a 4.3 M solution.
<h3>Molarity</h3>
Molarity is a measure of concentration that indicates the number of moles of solute that are dissolved in a given volume.
The molarity of a solution is calculated by dividing the moles of the solute by the volume of the solution:
Molarity is expressed in units .
<h3>This case</h3>
In this case, you know:
- molarity= 4.3 M= 4.3
- number of moles of the solute= 17.3 moles
- volume= ?
Replacing:
Solving:
4.3 × volume= 17.3 moles
volume= 17.3 moles÷ 4.3
<u><em>volume= 4.02 liters</em></u>
4.02 liters of ammonium sulfate are created if 17.3 moles of solute are dissolved to make a 4.3 M solution.
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The normality is the ratio of the equivalent to the volume of the solvent. To the mixture, 1.182 gms of magnesium should be added.
<h3>What is Normality?</h3>
Normality (N) is the grams or moles of solute per liter of solution.
Magnesium has 2 valence electrons in the outermost shell so,
1 mEq of Mg⁻² ions = atomic number of Mg ÷ valence electron
= 12 ÷ 2
= 6 mg
In a liter solution having 197 meq/l of Mg⁻²:
197 meq/l of Mg⁻² × 6 = 1182 mg
Therefore, 1.182 gms of magnesium ions should be added to the mixture.
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Answer:
1 that is 100%
Explanation:
here it is given that Fermi energy of the of the metal = 5 e.V
work function= 4 e.V
we have to find the probability that an incident electron will tunnel out if E=109 V/m
WORK FUNCTION : work function is defined as the energy required to withdraw an electron completely from the metal surface.
now the energy per unit volume in electric field is given by
E=
E=
E=
in electron volt E=4.427\times 10^{6}joule × 6.24\times 10^{18}
E=
hence the applied energy per unit volume is greater than the work work function of electron so there is probability of 100% that electron will tunnel out