Single bonds are those that bond with one atom, and sigma bonds are the strongest type of covalent bonds that are single bonded.

That means NO, not all single bonds are sigma bond, but all sigma bonds are single bonds.

6 0

3 years ago

Whatvdo you meant by acid and base

larisa86 [58]

Answer:

e meri a

Explanation:

Application software is a software which performs special task for user

3 0

3 years ago

Read 2 more answers

Help PLEASEEEE EXTRA POINTS

AysviL [449]

C: Z because it is the only area of land that is darkened.

7 0

3 years ago

Pyridinium is a weak acid having a pKa of 5.2. How much pyridine (the conjugate base of pyridinium) must be added to an aqueous

Whitepunk [10]

Answer:

Amount of pyridine required = 0.0316 M

Explanation:

pH of a buffer solution is calculated by using Henderson - Hasselbalch equation.

$pH=pK_a+log\frac{[Conjugate\ base]}{[weak\ acid]}$

Pyridinium is a weak acid and in the presence of its conjugate base, it acts as buffer.

Henderson - Hasselbalch equation for pyridine/pyridinium buffer is as follows:

$pH=pK_a+log\frac{[Py]}{PyH^+]}$

pH = 4.7

$pK_a=5.2$

$PyH^+$ (Pyridinium)=0.100 M

Substitute the values in the formula

$pH=pK_a+log\frac{[Py]}{PyH^+]}\\4.7=5.2 log\frac{[Py]}{0.100}$

$4.7-5.2=log\frac{[Py]}{0.100} \\-0.5=log\frac{[Py]}{0.100}\\\frac{[Py]}{0.100}=antilog -0.5\\\frac{[Py]}{0.100}=0.316$

$\frac{[Py]}{0.100} =0.316$

[Py]=0.0316\ M

Amount of pyridine required = 0.0316 M

7 0

3 years ago