Answer:
Explanation:
Concentration of 
= ![[HCO_3^-]=7.5\ \text{mM}](https://tex.z-dn.net/?f=%5BHCO_3%5E-%5D%3D7.5%5C%20%5Ctext%7BmM%7D)
for = 6.1
of blood = 7.1
The reaction is as follows
From the Henderson equation we get
![pH=pK_a+\log\dfrac{[HCO_3^-]}{[H_2CO_3]}\\\Rightarrow 7.1=6.1+\log \dfrac{7.5}{[H_2CO_3]}\\\Rightarrow 1=\log\dfrac{7.5}{[H_2CO_3]}\\\Rightarrow 10^1=\dfrac{7.5}{[H_2CO_3]}\\\Rightarrow [H_2CO_3]=\dfrac{7.5}{10}\\\Rightarrow [H_2CO_3]=0.75\ \text{mM}](https://tex.z-dn.net/?f=pH%3DpK_a%2B%5Clog%5Cdfrac%7B%5BHCO_3%5E-%5D%7D%7B%5BH_2CO_3%5D%7D%5C%5C%5CRightarrow%207.1%3D6.1%2B%5Clog%20%5Cdfrac%7B7.5%7D%7B%5BH_2CO_3%5D%7D%5C%5C%5CRightarrow%201%3D%5Clog%5Cdfrac%7B7.5%7D%7B%5BH_2CO_3%5D%7D%5C%5C%5CRightarrow%2010%5E1%3D%5Cdfrac%7B7.5%7D%7B%5BH_2CO_3%5D%7D%5C%5C%5CRightarrow%20%5BH_2CO_3%5D%3D%5Cdfrac%7B7.5%7D%7B10%7D%5C%5C%5CRightarrow%20%5BH_2CO_3%5D%3D0.75%5C%20%5Ctext%7BmM%7D)
Concentration of 
, ![[H_2CO_3]=[CO_2]](https://tex.z-dn.net/?f=%5BH_2CO_3%5D%3D%5BCO_2%5D)
Concentration of 
, ![[CO_2]=[H_2CO_3]=0.75\ \text{mM}](https://tex.z-dn.net/?f=%5BCO_2%5D%3D%5BH_2CO_3%5D%3D0.75%5C%20%5Ctext%7BmM%7D)
.
Answer:
Mass percent = 5.44 %
Explanation:
Given data:
Mass of solute (NaCl) = 13.6 g
Mass of solution = 250 g
Mass percent of solution = ?
Solution:
Formula:
Mass percent = mass of solute / mass of solution ×100
Mass percent = 13.6 g / 250 g × 100
Mass percent = 0.0544 × 100
Mass percent = 5.44 %
When a voltaic cell operates, ions move through a salt bridge. The presence of the salt bridge completes the circuit because it promotes ion flow. It maintains the charges balance since the electron are moving from a half cell to another.
To determine whether a compound is polar or nonpolar you have to take into account:
1) formation of dipoles due to the difference in electronegativities of the atoms
2) shape of the molecule to conclude whether there is a net dipole momentum.
You already, likely, know that the electronegativities of H and O are significatively different, being O more electronegative thatn H. So, you can conclude easilty that the electrons are atracted more by O than by H, thus creating two dipoles H→O
Regarding the shape, it may appear that the molecule is symmetrical, which would lead to the cancellation of the two dipoles. But that is not the true. The H2O2 is not symmetrical.
The lewis structure just show this shape
** **
H - O - O - H
** **
which is what may induce to think that the molecule is symmetrical, leading to the misconception that it is nonpolar.
But in a three dimensional arrangement you could see that the hydrogens are placed in non symmetrical positions, which leads to the formation of a net dipole momentum, and thus to a polar molecule.
The fact that H2O2 is a polar compound is the reason why it can be mixed with water and the H2O2 that you buy in the pharmacy is normally a solution in water.
So, the hydrogen peroxide is polar because the hydrogens are not placed symmetrically in the molecule, which result in a net dipole momentum.
Answer:
Ornaments are made of metal because they are lustrous and temple bells are made of metals because they have the property of sonority
Lustrous- property of metal by virtue of which metals can shine is known as lustre
sonority- property of metals by virtue of which metals produce a ringing sound is known as sonority
