Light an energy is captured by the green pigment ?

A buffer solution contains 0.240 M ammonium chloride and 0.499 M ammonia. If 0.0565 moles of perchloric acid are added to 250 mL

snow_lady [41]

Answer:

The pH of the resulting solution is 9.02.

Explanation:

The initial pH of the buffer solution can be found using the Henderson-Hasselbalch equation:

$pOH = pKb + log(\frac{[NH_{4}Cl]}{[NH_{3}]})$

$pOH = -log(1.78\cdot 10^{-5}) + log(\frac{0.240}{0.499}) = 4.43$

$pH = 14 - pOH = 14 - 4.43 = 9.57$

Now, the perchloric acid added will react with ammonia:

$n_{NH_{3}} = 0.499moles/L*0.250 L - 0.0565 moles = 0.0683 moles$

Also, the moles of ammonium chloride will increase in the same quantity according to the following reaction:

NH₃ + H₃O⁺ ⇄ NH₄⁺ + H₂O

$n_{NH_{4}Cl} = 0.240 moles/L*0.250L + 0.0565 moles = 0.1165 moles$

Finally, we can calculate the pH of the resulting solution:

$pOH = pKb + log(\frac{[NH_{4}Cl]}{[NH_{3}]})$

$pOH = -log(1.78\cdot 10^{-5}) + log(\frac{0.1165 moles/0.250 L}{0.0683 moles/0.250 L}) = 4.98$

$pH = 14 - 4.98 = 9.02$

Therefore, the pH of the resulting solution is 9.02.

I hope it helps you!

5 0

3 years ago

¿Cuántos litros de oxígeno en condiciones normales se producen a partir de 0,45 mol de O2?

Lerok [7]

..............................

7 0

3 years ago

The law of conservation of momentum states that if objects exert forces only on each other, their total momentum is ____________

iren2701 [21]

Answer:

Conserved.

Explanation:

Momentum can be defined as the multiplication (product) of the mass possessed by an object and its velocity. Momentum is considered to be a vector quantity because it has both magnitude and direction.

Mathematically, momentum is given by the formula;

$Momentum = Mass * Velocity$

The law of conservation of momentum states that the total linear momentum of any closed system would always remain constant with respect to time.

This ultimately implies that, the law of conservation of momentum states that if objects exert forces only on each other, their total momentum is conserved.

8 0

3 years ago

Calculate the mass of water produced by the metabolism of 49.0 g of glucose (C6H12O6). C6H12O6 + 6O2 → 6CO2 + 6H2O

aivan3 [116]

I will mark brainlist please help

1) what is the subject of a sentence?

• the verb

• tells who or what the sentence is about

• the action in the sentence

2) What is the predicate of a sentence?

• who the sentence is about?

• tells what the subject is or does

3) What is the PREDICATE in this sentence.

- Mrs. Shaffer is crazy

• Mrs. Shaffer

• is

• is crazy

• Shaffer is crazy

4) what is the predicate of this sentence.

- Friday is the best day of the week

• Friday

• is the best day of the week

5) What is the subject of this sentence?

- The turtle is swimming in the ocean

• the turtle

• is swimming in the ocean

6) What is the the complete predicate of this sentence?

- The class studied whales.

• class

• the class

• whales

• studied whales

7) What is the predicate in the sentence

- She drank her whole glass of milk

• she

• milk

• drank her whole glass of milk

• drank milk

8) what is the subject in the sentence?

- The music class attended the opera.

• the music class

• attended

• music

9) identify the complete subject.

- Susan and Kay went swimming.

• went swimming

• Susan and Kay

• went

10) identify the COMPLETE predicate

- Tina and her friends went to the movies

• Tina

• her friends

• to the movies

• went to the movies

11) identify the SIMPLE PREDICATE PART.

- Tina and her friends went to the movies

• Tina

• her friends

• went

• the movies

12) identify the circled line in the sentence.

- All of the ((((PLAYERS)))) went to practice

• complete subject

• simple subject

• simple predicate

• complete predicate

7 0

3 years ago

The chemical symbol for sodium is <br> A. S. <br> B. N. <br> C. Sn. <br> D. Na.

user100 [1]

The chemical symbol for sodium is Na. Hope this helped!

8 0

3 years ago