ZnO
is the answer for what is the chemical formula for zinc?
The frequency of the photon of light is 4.4 * 10¹⁶ Hz
<h3>Energy and frequency of light</h3>
- The energy and frequency of light are related by the formula given below:
- E = hf
Where h is Planck's constant = 6.626 * 10⁻³⁴
f is frequency
E = energy
making f subject of the formula
f = E/h
f = 2.95 × 10⁻¹⁷/6.626 * 10⁻³⁴
f = 4.4 * 10¹⁶ Hz
Therefore, the frequency of the photon of light is 4.4 * 10¹⁶ Hz
Learn more about frequency and energy of photons at: brainly.com/question/13396102
Answer:C
Explanation: Because the hot air is less dense than the surrounding air
First, we write out a balanced equation.
HA <--> H(+) + A(-)
Next, we create an ICE table
HA <--> H+ + A-
[]i 0.40M 0M 0M
Δ[] -x +x +x
[]f 0.40-x x x
Next, we write out the Ka expression.
Ka = [H+][A-]/[HA]
Ka = x*x/(0.40-x)
However, because Ka is less than 10^-3, we can assume the amount of dissociation is negligible. Thus,
Assume 0.40-x ≈ 0.40
Therefore, 1.2x10^-6 = x^2/0.40
Then we solve for the [H+] concentration, or x
![\sqrt{0.40(1.2*10^{-6})} =x](https://tex.z-dn.net/?f=%20%5Csqrt%7B0.40%281.2%2A10%5E%7B-6%7D%29%7D%20%3Dx)
x=6.93x10^-4
Next, to find pH we do
pH = -log[H+]
pH = -log[6.93x10^-4]
pH = 3.2
Answer: The U.S. has a greater gold resource
Explanation: Canada has 3,500 tons while the U.S. has 6,000