1.)A photon has a wavelength of 1.95 x10^-11 m. What is the frequency? a.)Using your answer, find the energy of that photon

Explanation:

Given parameters:

Wavelength of photon = 1.95 x 10⁻¹¹m

Unknown:

Frequency of the wave  = ?

Energy of the photon = ?

Solution:

The frequency and wavelength of a wave are related by the expression;

   C = Fλ

C = speed of light  = 3 x 10⁸m/s

F = frequency

λ = wavelength

 Insert the parameters and solve;

    3 x 10⁸  = F x 1.95 x 10⁻¹¹

       F  =   = 1.54 x 10¹⁹Hz

Energy of the photon is related to frequency using the expression below;

  E  = hF

h is the Planck's constant = 6.634 x 10⁻³⁴m²kg/s

Insert the parameters and solve;

    E = 6.634 x 10⁻³⁴ x 1.54 x 10¹⁹   = 1.02 x 10⁻¹⁴J

1.consider the following balanced equation and answer parts a through. show calculations for each part.  

3 ag(s) + 4 hno3(aq) → 3 agno3(aq) + no(g) + 2 h2o(l)  

a. calculate the number of moles of agno3 produced by the reaction of 3 moles of ag with excess hno3. if the number to the left of the compound represents the number of moles of the compound which are present, then 3 moles of ag react with 4 moles hno3 to produce 3 moles agno3 (aq).

so the answer to a would be 3 moles.

b. calculate the number of moles of agno3 produced by the reaction of 108 grams of ag with excess hno3.  

i'm not sure how to plug in the grams of silver into an equation using moles to find how many moles are produced.

c. calculate the number of grams of agno3 produced by the reaction of 108 grams of ag with excess hno3  

d. calculate the number of moles of no produced as a byproduct of the reaction of 108 grams of ag with excess hno3.  

e. calculate the number of grams of no produced as a byproduct starting with 108 grams of ag and excess hno3.  

explanation: