Three services that banks provide are:

l**oans, credit cards, and savings accounts**

**Hope this helps you :)**

The** energy** of the **photons** is

<h3>Energy of Photons</h3>

The formula for calculating the** energy of photons** is expressed as:

where

- h is the
**Plank constant** - c is the
**speed** of light - λ is the
**wavelength**

**Substitute** the values into the formula to have:

Hence the** energy** of the **photons** is

Learn more on **energy of photons** here; brainly.com/question/7464909

<u>**Answer:**</u>** The wavelength of light is **

<u>**Explanation:**</u>

**To calculate the wavelength of light, we use Rydberg's Equation:**

Where,

= Wavelength of radiation

= Rydberg's Constant =

= Higher energy level = 7

= Lower energy level = 2

**Putting the values in above equation, we get:**

**Converting this into nanometers, we use the conversion factor:**

So,

**Hence, the wavelength of light is **

**Answer: 5.844 grams of NaCl needed to make solution. **

**Explanation:**

**Answer : The concentration of **** and **** at equilibrium is, 0.0031 M and 0.0741 M respectively.**

**Explanation : Given,**

Moles of = 0.166 mol

Volume of solution = 2.15 L

**First we have to calculate the concentration of **

**Now we have to calculate the concentration of **** and **** at equilibrium.**

**Initial conc.** 0.0772 0 0

**At eqm.** 0.0772-x x x

**The expression for equilibrium constant is:**

By solving the term, we get the value of 'x'.

x = 0.0741

Thus,

The concentration of at equilibrium = (0.0772-x) = (0.0772-0.0741) = **0.0031 M**

The concentration of at equilibrium = x =** 0.0741 M**