Respuesta :
Given :
A student has a 1 g sample of each of the following compounds: NaCl, KBr, and KCl.
To Find :
The samples in order of increasing number of moles in the sample.
Solution :
Molecular mass of NaCl, KBr, and KCl is 58.5 g/mol , 119 g/mol and
74.5 g/mol respectively .
Moles of NaCl , [tex]n_1=\dfrac{1}{58.5}=0.017\ mol[/tex].
Moles of KBr , [tex]n_2=\dfrac{1}{119}=0.008\ mol[/tex].
Moles of KCl , [tex]n_2=\dfrac{1}{74.5}=0.013\ mol[/tex].
The order of moles in increasing order is :
KBr , KCl and NaCl .
Hence , this is the required solution .
The increasing order of the moles in sample has been, KBr < KCl < NaCl.
The moles of sample have been defined as the mass of sample with respect to molar mass. The moles of sample have been given by:
[tex]\text {Moles}=\dfrac{\text {mass}}{mwt}[/tex]
The molecular mass of the sample has been given by mwt.
The moles in 1 g mass of the following samples has been given by:
- Moles of NaCl:
[tex]\rm Moles=\dfrac{1}{58.44}\\Moies=0.017\;mol[/tex]
1 gram sample of NaCl has been 0.017 mol.
- Moles of KBr:
[tex]\rm Moles=\dfrac{1}{119.002} \\Moles=0.008\;mol[/tex]
1 gram sample of KBr has been 0.008 mol.
- Moles of KCl:
[tex]\rm Moles=\dfrac{1}{74.5513} \\Moles=0.013\;mol[/tex]
1 gram sample of KCl has been 0.0.13 mol.
The increasing order of the moles in sample has been, KBr < KCl < NaCl.
For more information about moles in a sample, refer to the link:
https://brainly.com/question/4816100
