Answer:
pH = 11.3
Explanation:
From the question given above, the following data were obtained:
Concentration of hydronium ion [H₃O⁺] = 4.950×10¯¹² M
pH =.?
The pH of a solution is defined by the following equation:
pH = –Log [H₃O⁺]
Thus, with the above formula, we can obtain the pH of the solution as follow:
Concentration of hydronium ion [H₃O⁺] = 4.950×10¯¹² M
pH =.?
pH = –Log [H₃O⁺]
pH = –Log 4.950×10¯¹²
pH = 11.3
Answer:
270. mL
General Formulas and Concepts:
<u>Acid-Base Titrations</u>
Dilution: M₁V₁ = M₂V₂
- M₁ is stock molarity
- V₁ is stock volume
- M₂ is new molarity
- V₂ is new volume
Explanation:
<u>Step 1: Define</u>
<em>Identify</em>
[Given] V₂ = 629.1 mL
[Given] M₂ = 11.2 M
[Given] M₁ = 26.1 M
[Solve] V₁
<u>Step 2: Find Stock Volume</u>
- Substitute in variables [Dilution]: (26.1 M)V₁ = (11.2 M)(629.1 mL)
- Multiply: (26.1 M)V₁ = 7045.92 M · mL
- Isolate V₁ [Cancel out units]: V₁ = 269.959 mL
<u>Step 3: Check</u>
<em>Follow sig fig rules and round. We are given 3 sig figs as our lowest.</em>
269.959 mL ≈ 270. mL
Answer:
The correct answer is - 800.
Explanation:
Given:
Total amount = ? or assume x
spend in buying birthday item = 3/4 of x
given to sister = 1/5 of x
remaining to mother = 40
solution:
the remaning amount = x- (3x/4+x/5) = 4=
=> x- 19x/20 = 40
=> x = 20*40
=> x = 800
thus, the correct answer is = 800
Explanation:
B. Plant cells is the correct answer