Answer:
m = 671 grams
Explanation:
Given that,
No of moles, n = 4.9
Molar mass of Barium, M = 137 g
Mass divided by molar mass is equal to no of moles. It can be given by the formula as follows :
or
m = 671 grams
So, the total mass of the sample of Barium is 671 grams.
Answer:
go to google
Explanation:it all ways work
Answer:
Explanation:
First of all we need to find the amount of atoms per volume (m³). We can do this using the density and the molar mass.
Now, the fraction of vacancies is equal to the N(v)/N ratio.
- N(v) is the number of vacancies
- N is the number of atoms per volume calculated above.
Therefore:
The fraction of vacancies at 600 °C will be:
I hope it helps you!
Answer:
5 is the answer since they are asking for pair. And 3 pairs in the triple bond
The number of kilograms of solvent is 0.238 kg.
Moles of solute = given mass/ molar mass
= 5.0 g/ 30g/mol
= 0.167 mol
Molality = Moles of solute/ weight of solvent (in kg)
0.70 m = 0.167 mol/ weight of solvent (in kg)
Weight of solvent (in kg) = 0.167/0.70
Weight of solvent (in kg) = 0.238 kg
Hence, the number of kilograms of solvent is 0.238 kg.
Molality is a degree of the number of moles of solute in a solution corresponding to 1 kg or a thousand g of solvent. This contrasts with the definition of molarity that is primarily based on a distinctive quantity of answer. A commonly used unit for molality in chemistry is mol/kg.
Find out how molarity and molality fluctuate! The molality of a solution is identical to the moles of solute divided by way of the mass of solvent in kilograms, whilst the molarity of an answer is identical to the moles of solute divided by the volume of solution in liters.
Learn more about Molality here:-
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