Respuesta :
Answer:
115g/mol
Explanation:
To get the molar mass, we know that the it is equal to the mass divided by the number of moles. We have the mass but we do not have the number of moles.
We get this by working through the solution information. Firstly, we need to know the number of moles in 750ml for a molarity of 0.29m
Now, since 0.29 moles is present in 1000ml, x moles will be present in 750ml
The value of x is obtained as follows:
x = (750 * 0.29)/1000 = 0.2175 moles
Now since we have the number of moles, we can then obtain the molar mass.
Molar mass = mass/number of moles = 25.0g/0.2175 = 114.94 approximately 105g/mol
The molar mass of a chemical compound is a measure of the mass of the substance of the compound in grams divided by the amount of substance present in moles.
It is calculated as:
[tex]\text{M} &= \dfrac{m}{n}[/tex]
where M = molar mass, m = mass of a substance, n =number of moles of substance present.
Given,
- mass of the substance (m)= 25.0 g
- Volume of the substance= 750 ml
- Molarity of the compound= 0.290 m
0.29 mol is present in 1000 ml then the number of moles present in 750 ml will be:
= 750 × 0.00029
= 0.2175 moles
So, the molar mass can be calculated as:
[tex]\text{M} &= \dfrac{m}{n}[/tex]
[tex]\text{M} &= \dfrac{25g}{0.2175 moles} = 114.94[/tex]
Therefore, the molar mass of the compound will be approximately 115 g/mol.
To learn more about molar mass follow the given link:
https://brainly.com/question/13802575
