I know the answer to your question but if you want me to answer this question first, I need your help with my question "How do I solve number 12? Quick please I need help ASAP!!!"
<h3>
Answer:</h3>
- They show the elements of make up a compound
- They show the types of atoms that make up a molecule
- They show the number of each type of atom in a molecule
<h3>
Explanation:</h3>
To answer this question we need to know what is a compound.
- A compound is a substance that is made by two or more atoms of different elements that are chemically combined.
- A chemical formula of a compound is a formula that shows the elements that make up a compound and also the types of atoms that make up the molecule.
- Additionally, the chemical formula shows the number of each type of atom in a molecule.
- In this case, the chemical formula of a molecule of H₂O shows that it is made up of one hydrogen atom and two oxygen atoms.
Answer: The percent yield of lithium chloride if a reaction starts with 20.0 g lithium hydroxide and yields 6.00 g lithium chloride is 17.2 %
Explanation:
The balanced chemical reaction is
![LiOH+KCl\rightarrow LiCl+KOH](https://tex.z-dn.net/?f=LiOH%2BKCl%5Crightarrow%20LiCl%2BKOH)
To calculate the moles, we use the equation:
![\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}](https://tex.z-dn.net/?f=%5Ctext%7BNumber%20of%20moles%7D%3D%5Cfrac%7B%5Ctext%7BGiven%20mass%7D%7D%7B%5Ctext%20%7BMolar%20mass%7D%7D)
a) moles of ![LiOH](https://tex.z-dn.net/?f=LiOH)
![\text{Number of moles}=\frac{20.0g}{24g/mol}=0.83moles](https://tex.z-dn.net/?f=%5Ctext%7BNumber%20of%20moles%7D%3D%5Cfrac%7B20.0g%7D%7B24g%2Fmol%7D%3D0.83moles)
b) moles of ![LiCl](https://tex.z-dn.net/?f=LiCl)
![\text{Number of moles}=\frac{6.00g}{42g/mol}=0.14moles](https://tex.z-dn.net/?f=%5Ctext%7BNumber%20of%20moles%7D%3D%5Cfrac%7B6.00g%7D%7B42g%2Fmol%7D%3D0.14moles)
According to stoichiometry :
1 mole of
produces = 1 mole of ![LiCl](https://tex.z-dn.net/?f=LiCl)
Thus 0.83 moles of
produce=
of ![LiCl](https://tex.z-dn.net/?f=LiCl)
Mass of ![LiCl=moles\times {\text {Molar mass}}=0.83moles\times 42g/mol=34.9g](https://tex.z-dn.net/?f=LiCl%3Dmoles%5Ctimes%20%7B%5Ctext%20%7BMolar%20mass%7D%7D%3D0.83moles%5Ctimes%2042g%2Fmol%3D34.9g)
The theoretical yield of
= 34.9 g
The experimental yield of ethanol = 6.00 g
Now we have to calculate the percent yield of ethanol.
![\%\text{ yield}=\frac{\text{Actual yield}}{\text{Theoretical yield}}\times 100=\frac{6.00g}{34.9g}\times 100=17.2\%](https://tex.z-dn.net/?f=%5C%25%5Ctext%7B%20yield%7D%3D%5Cfrac%7B%5Ctext%7BActual%20yield%7D%7D%7B%5Ctext%7BTheoretical%20yield%7D%7D%5Ctimes%20100%3D%5Cfrac%7B6.00g%7D%7B34.9g%7D%5Ctimes%20100%3D17.2%5C%25)
Therefore, the percent yield is, 17.2 %
Among these two compounds
Lactic Acid is completely soluble in water (1000 g/L) while,
Myristic Acid is insoluble in water [<span>20 mg/L (20 °C)].
Explanation:
Among other factors solubility greatly depends upon the inter-molecular interactions between solute and solvent (
<em><u>LIKE DISSOLVES LIKE</u></em><u>)</u>. Greater the interactions greater is the solubility.
As shown below, Lactic Acid contains two hydroxyl groups and one carbonyl group. These three groups are involved in forming Hydrogen Bond Interactions with the molecules of Water.
Whereas, Myristic Acid contains a long chain of carbon which is non polar in nature. So, due to this non polar carbon chain no such interactions are formed as formed in case of Lactic Acid. Still the less solubility found is due to the interaction of Carboxylic group of Myristic Acid with water molecules, which is comparatively very less.</span>
Hypochlorous acid is the answer
malory