The blue colour of the sky results from the scattering of sunlight by air molecules. Blue light has a frequency of about 7.5*10^14 Hz Calculate the energy of a mole of photon with this frequency

The energy of a mole of photon is 2.99x10⁵ J.

Explanation:

First, we need to remember that in 1 mol of photons we have 6.02x10²³ photons.

The energy is given by:

Where:

h: is the Plank's constant = 6.62x10⁻³⁴ J.s

ν: is the frequency = 7.5x10¹⁴ Hz    

N: is the number of photons = 6.02x10²³ photons

Hence, the energy of a mole of photon is:

I hope it helps you!      

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6