All categories

3 years ago

A certain shade of blue has a frequency of 7.05 × 1014 hz. What is the energy of exactly one photon of this light?

Chemistry

1 answer:

zimovet [89]3 years ago

4 0

Energy of photon is equal to the product of Planck's constant and frequency.

The mathematical expression is given as :

$E = h\nu$

where,

E = energy of photon

h = Planck's constant i.e. $6.626 \times 10^{-34} Js$

$\nu$ = frequency

Put the given values of frequency and Planck's constant in above formula, we get

$E =6.626 \times 10^{-34} Js\times 7.05 \times 10^{14} Hz$

= $46.7133\times 10^{-20} Js Hz$

Since, Hz is equal to $second^{-1}$

Thus, energy of photon = $46.7133 \times 10^{-20} J$ or $4.67133 \times 10^{-19} J$

You might be interested in

Please inbox me I will thanks your all answers

prohojiy [21]

Answer:

Really

Explanation:

3 0

3 years ago

I need somebody to help me with my homework pls i dont get it .

zubka84 [21]

26. B
27. D
28. C
Hope this helped ☺️

7 0

3 years ago

20 mL of Ba(OH)2 solution with unknown concentration was neutralized by the addition of 43.89 mL of a .1355 M HCl solution. Calc

bezimeni [28]

Answer:

Concentration of the barium ions = $[Ba^{2+}] = 0.4654 M$

Concentration of the chloride ions = $[Cl^{-}]=0.9308 M$

Explanation:

$Moles (n)=Molarity(M)\times Volume (L)$

Moles of hydrogen chloride = n

Volume of hydrogen chloride solution = 43.89 mL = 0.04389 L

Molarity of the hydrogen chloride = 0.1355 M

$n=0.1355 M\times 0.04389 L=0.005947 mol$

$Ba(OH)_2+2HCl\rightarrow BaCl_2+2H_2O$

According to reaction, 2 moles of HCl reacts with 1 mole of barium hydroxide.

Then 0.05947 moles of HCl will react with:

$\frac{1}{2}\times 0.05947 mol=0.029735 mol$ barium hydroxide

Moles of barium hydroxide = 0.029735 mol

$Ba(OH)_2(aq)\rightarrow Ba^{2+}(aq)+2OH^-(aq)$

1 mole of barium hydroxide gives 1 mole of barium ion in an aqueous solution. Then 0.029735 moles of barium hydroxide will give:

$=1\times 0.029735 mol= 0.029735 mol$

Volume of solution after neutralization reaction :

= 20.0 mL + 43.89 mL = 63.89 mL = 0.06389 L

Concentration of the barium ions = $[Ba^{2+}]$

$[Ba^{2+}]=\frac{0.029735 mol}{0.06389 L}=0.4654 M$

$Ba(Cl)_2(aq)\rightarrow Ba^{2+}(aq)+2Cl^-(aq)$

1 mole of barium chloride gives 1 mole of barium ions and 2 moles of chloride ions in an aqueous solution.

Then concentration of chloride ions will be:

$[Cl^-]=2\times [Ba^{2+}]=2\times 0.4654 M=0.9308 M$

8 0

3 years ago

What does every atom of the same element have in common

VikaD [51]

All atoms of the same element have the same
number of protons. Every atom also has a nucleus.

5 0

3 years ago

K forms the compound K2O , which is an ionic compound that is brittle. Identify another element, M , that is likely to form a br

meriva

The metal is sodium, Na.

<u>Explanation:</u>

K₂O is an ionic compound in which K is in the oxidation state of +1 and it belongs to group 1.

Group 1 elements also form oxides with the metals with the general formula M₂O and M being Na, K, Li and so on.

Metals Like sodium and Potassium are so brittle in nature and also their oxides.

So the other metal that form metal oxide which is brittle as well as ionic in nature, and so the metal oxide is Na₂O.

So the metal is sodium, Na.

4 0

3 years ago