Answer:
A. 1.585 x 10^-12 M.
B. 2.512 x 10^-12 M.
Explanation:
A.
citric acid: pH 2.20
pH + pOH = 14
pOH = 14 - 2.20
= 11.80
Remember, pOH = - log [OH]
[OH] = 10^-pOH
= 10^-11.8
= 1.585 x 10^-12 M
B.
Household vinegar: pH 2.40
pH + pOH = 14
pOH = 14 - 2.40
= 11.60
Remember, pOH = - log [OH]
[OH] = 10^-pOH
= 10^-11.6
= 2.512 x 10^-12 M
Answer:
A velocity-time graph shows how velocity changes over time. The sprinter's velocity increases for the first 4 seconds of the race, it remains constant for the next 3 seconds, and it decreases during the last 3 seconds after she crosses the finish line.
Answer:
4.1 mol·L⁻¹
Explanation:
You are diluting the solution with water, so you can use the dilution formula
c₁V₁ = c₂V₂ Divide each side by V₂
c₂ = c₁ × V₁/V₂
Data:
c₁ = 7.0 mol·L⁻¹; V₁ = 2.5 L
Water added = 1.5 L
Calculations:
(a) <em>New volume
</em>
V₂ = 2.5 L + 1.8 L
= 4.3 L
(b) <em>New concentration
</em>
c₂ = 7.0 × 2.5/4.3
= 7.0 × 0.581
= 4.1 mol·L⁻¹
Answer:
I'm not really religious but I will take a shot looking from your perspective.
He shows that he is still acting around us by showing how powerful he is and that to remind us that he still does things on this earth and still acts around this earth.