Answer:
When the big power lines are down, electricity is going through the ground and up you bike to the handles, so when yo touch it, you are electrocuted
Explanation:
Answer:
Explanation:
Given parameters:
pH of HNO₃ = 3.75
Unknown:
[OH⁻], concentration of hydroxyl ions = ?
pOH of the solution = ?
Solution
The pH or pOH scale is a convenient way of expressing the level of acidity or alkalinity of aqueous solutions.
The pH of a solution is the negative logarithm to base 10 of the hydrogen ion concentration of the solution:
pH = -log₁₀[H⁺]
pOH = -log₁₀[OH⁻]
For any aqueous solution, the sum of the pH and pOH is 14. That is;
pH + pOH = 14
Now solving for [OH⁻]:
HNO₃ + H₂O → H₃O⁺ + NO₃⁻
Since pH + pOH = 14
pOH = 14 - pH = 14 -3.75 = 10.25
since pOH = -log₁₀[OH⁻]
10.25 = -log₁₀(OH⁻)
[OH⁻] = inverse log₁₀(-pOH)
[OH⁻] = inverse log₁₀(-10.25) = 5.62 x 10⁻¹¹moldm⁻³
Answer:
atoms of the same element that have different masses due to their
varying numbers of neutrons
Explanation:
Answer: 82.9kPa
Explanation:
Gas pressure can be measured in several units, they include psi (pound per square inch), kPa (kilo pascal).
Recall that:
1 Kilopascal (kPa) = 0.14503773779 psi
So, let Z kPa = 12.02 psi
To get the value of Z, cross multiply
12.02 psi x 1kPa = 0.14503773779 psi x Z kPa
12.02 = 0.14503773779Z
Divide both sides by 0.14503773779
12.02/0.14503773779 = 0.14503773779Z/0.14503773779
82.9 kPa = Z
Thus, the 12.02 psi is equivalent to 82.9 kPa
Answer:
The answer to your question is A.
Pure substances can not be broken down into others, so they cannot be molecules
Explanation: