Number of photons can be calculated by dividing the needed energy by the energy per photon.
The minimum energy needed is given as 2 x 10^-17 joules
Energy per photon = hc / lambda where h is planck's constant, c is the speed of light and lambda is the wavelength
Energy per photon = (<span>6.626 x 10^-34 x 3 x 10^8) / (475 x 10^-9)
= 4.18 x 10^-19 J
number of photons = (2 x 10^-17) / (4.18 x 10^-19)
= 47.79 photons which is approximately 48 photons</span>
The answer is potential hydrogen
the ph in the chemistry test used to test acidity of substances stand for "potential hydrogen" as in how much hydrogen is in each of the substances being tested
Tetrahedron generally known as triangular pyramid consists of 4 triangular faces, 6 edges and 4 vertices. The base of the tetrahedron is a triangle. All the vertices have the same atom that is bonded to the central metal atom which lies in the centre of the tetrahedron. We take as an example to see how the atoms actually bond in tetrahedron. It is quite visible from the image that 4 O-atoms lies on all the 4 vertices and 1 Si-atom lie in the centre.
The deer leaped gracefully over the rabbit and ran into the forest uses the active voice.
<h3>What is an Active voice?</h3>
This refers to a sentence where the subject performs the action stated by the verb.In this type of voice the order is usually subject + verb + object.
The option D however depicts this order as the deer is the subject , leaped is the verb and rabbit serves as the object which makes it the most appropriate choice.
Read more about Active voice here brainly.com/question/25897080
It becomes more stable
delta G gets closer to zero