Answer:
[H3O+] = 0.0117 M
[OH-] = 8.5 * 10^-13 M
Explanation:
Step 1: Data given
Concentration of HCl = 0.0117 M
Step 2:
HCl is a strong acid
pH of a strong acid = -log[H+] = - log[H3O+]
[H3O+] = 0.0117 M
pH = -log(0.0117)
pH = 1.93
pOH =14 - 1.93 = 12.07
pOH = -log[OH+] = 12.07
[OH-] = 10^-12.07 = 8.5 * 10^-13
Or
Kw / [H3O+] = [ OH-]
10^-14 / 0.0117 = 8.5*10^-13
Answer:
NaOH + H2SO4 ‐‐> 2H2O + Na2SO4;
<h3>
Answer: D) all of the above</h3>
Explanation:
The lungs pump oxygen in and carbon dioxide out, which goes through the blood stream to help with the cell's energy needs.
Nutrients pass through the blood stream as well. The nutrients start with the digestive system (mouth, esophagus, stomach, small intestine) before going into the blood stream. The nutrients are building blocks to help make new cells when old ones die off.
When those cells die off, the body sheds them like dead skin, but internal dead cells are passed off as waste. This waste and other byproducts the body doesn't need passes through the blood stream as well.
In short, the blood stream is basically the highway to help get desired materials (eg: oxygen and nutrients) and get rid of waste (eg: carbon dioxide and other unwanted byproducts or dead cell material)
So that's why the answer includes A, B and C.
Answer:
The answers to your questions are below:
Explanation:
Question 31 Silicon and sulphur, because they are in the same period (3)
Question 34 the third option, density is not in the table
Question 37 group 1A alkali metals
Question 38 group 1A, oxygen group
Question 39 They are metalloids
