Answer:
[OH] = 6.31 * 10^-7 M
Explanation:
Mathematically;
pH + pOH = 14
Mathematically;
pH = -log [H3O+]
also;
pOH = -log [OH]
From the question; [H3O+] = 1.75 * 10^-8 M
pH = -log [1.75 * 10^-8]
pH = 7.76
since pH is normally given to 1 decimal place
we can say pH = 7.8
Now;
pH + pOH = 14
pOH = 14-7.8
pOH = 6.2
now pOH = -log [OH]
[OH] = -antilog 6.2
[OH] = 6.31 * 10^-7 M
Answer:
On google it says this: HF will be the most soluble in water. Substances which form hydrogen bonding with polar water molecules are soluble in water. F has the highest electronegativity amongst other halogens.
Idk maybe A?
Explanation:
Answer:
The website is inaccurate.
Explanation:
Remember, a chemical change is characterized by many things, but most commonly:
- A change in color, temperature or state.
- An irreversible change
- One or more new substances are formed
Rusting (Iron oxide) is a redox reaction (Oxidation-Reduction Reaction) where iron molecules come in contact with water and oxygen molecules. The iron molecules lose electrons, becoming oxidized, while oxygen gains electrons, becoming reduced.
Is rust reversable? (No)
Did the colour of the iron on the surface change? (Yes)
Did a new substance form? (Yes, Read above).
Hope I helped! Have a good day!
Answer:
B
Explanation:
Carbon Dioxide is one of waste produced from Our cells during respiration. The circulatory system carries Carbon Dioxide from cells either in haemaglobin in RBC or plasm. The Carbon Dioxide being carried to blood cappilaries near alveoli before diffused into alveoli and then being removed away by respiratory system in the process of respiration while we exhale
