Answer: 4.) CH3O is the answer, which stands for Methoxide.
Explanation:
Answer:
Climate change will make plants—and us—thirstier. The combined effects of increased CO2 levels and warmer temperatures will increase water consumption by vegetation. That will lead to water declines in streams and rivers like the Ashepoo River in South Carolina
Explanation:
Answer:
True
Explanation:
In an alpha decay, the isotope of an element releases two protons and two neutrons. An alpha particle or helium has two protons and two neutrons and hence, in an alpha decay an alpha particle is released.
Hence, the given statement is true
Answer:
A buffer solution is a mixture of two pair salts to maintain a stable pH.
Explanation:
This mixture is made always with a complementary pair of salts (one acid an another basic).
Example:
Acetic Acid (CH3COOH) and Sodium Acetate (NaH3COO).
So when you add a little bit more acid to this mixture, the basic part of the buffer, in this case the Sodium Acetate, will neutralize it and the pH will remain the same.
On the other hand, if the mixture receives some basic substance, the acid part of the buffer, the acetic acid, will neutralize it, so again the pH will remain the same.
Answer:
pH = 11.37
Explanation:
Sodium cyanide will dissociate into sodium ion and cyanide ion. This cyanide ion will get hydrolyzed.The ICE table for hydrolysis of cyanide ion is:
Initial 0.265 0 0
Change -x +x +x
Equilibrium 0.265-x x x
![K=\frac{[HCN][OH^{-}}{[CN^{-}]}](https://tex.z-dn.net/?f=K%3D%5Cfrac%7B%5BHCN%5D%5BOH%5E%7B-%7D%7D%7B%5BCN%5E%7B-%7D%5D%7D)
This K is Kb of HCN
Kb = Kw / Ka
Putting values
x can be ignored in denominator as Kb is very low
x= 2.33X10⁻³ M = [OH⁻]
pOH = -log[OH⁻]
pOH = -log(2.33X10⁻³ )
pOH = 2.63
pH = 14- pOH = 14-2.63 = 11.37
