1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Vesna [10]
3 years ago
7

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
An oxide of nitrogen is 25.9% N by mass, has a molar mass of 108 g/mol, and contains no nitrogen-nitrogen or oxygen-oxygen bonds
Sonja [21]

Answer:

The compound is N2O4

Explanation:

We have certain important pieces of information about the compound;

1) it is an oxide (a binary compound of nitrogen and oxygen)

2) there are no N-N bonds present

3) there are no O-O bonds present

Since it contains only nitrogen and oxygen then nitrogen accounts for 25.9% of the molecule by mass then oxygen should account for (100-25.9) = 74.1% oxygen

Relative atomic mass of oxygen = 16

Relative atomic mass of nitrogen = 14

We now deduce the empirical formula

Nitrogen. Oxygen

25.9/14. 74.1/16

1.85/1.85. 4.6/1.85 (divide through by the lowest ratio)

1 2

Empirical formula is NO2

To find the molecular formula

(NO2)n = 108

(14+2(16))n= 108

46n=108

n= 108/46

n= 2

Therefore molecular formula= N2O4

4 0
3 years ago
Metal in period 6 group 1
Nady [450]
The answer is ceslum
4 0
3 years ago
What is the pH at the equivalence point in the titration of a 25.7 mL sample of a 0.370 M aqueous nitrous acid solution with a 0
expeople1 [14]

Answer:

pH = 8.24

Explanation:

Nitrous acid (HNO₂) reacts with KOH, thus:

HNO₂ + KOH → KNO₂ + H₂O

Moles of HNO₂ are:

0.0257mL ₓ (0.370mol / L) = 0.00951moles.

In equivalence point, the complete moles of nitrous acid reacts with KOH producing potassium nitrite. There are needed:

0.00951mol ₓ (1L / 0.491mol) = 0.01937L ≡ 19.4mL of 0.491M KOH to reach equivalence point.

Total volume in equivalence point is: 19.4mL + 25.7mL = <em>45.1mL</em>

Potassium nitrite is in equilibrium with water, thus:

NO₂⁻ + H₂O ⇄ HNO₂ + OH⁻

Where equilibrium constant, Kb, is defined as:

Kb = 1.41x10⁻¹¹ = \frac{[OH^-][HNO_2]}{[NO_2]}

In equilibrium, molarity of each compound are:

[NO₂⁻]: 0.00951mol/0.00451L - X = 0.211M - X

[HNO₂]: X

[OH⁻]: X

<em>Where X is reaction coordinate</em>

Replacing in Kb:

1.41x10⁻¹¹ = \frac{[X][X]}{[0.211 -X]}

0 = X² + 1.41x10⁻¹¹X - 2.97x10⁻¹²

Solving for X:

X = -1.72x10⁻⁶ <em>FALSE ANSWER. There is no negative concentrations.</em>

X = 1.72x10⁻⁶. <em>Right answer.</em>

That means:

[OH⁻]: 1.72x10⁻⁶M

As pOH is -log [OH⁻] and pH = 14-pOH:

pOH = 5.76; <em>pH = 8.24</em>

3 0
3 years ago
Which of the following molecules/ions has a pyramid shape?
andreev551 [17]
i think its a right tringle
3 0
3 years ago
Which base has the lowest ionization constant (Kb)?
inysia [295]

Answer:D.Blood

Explanation:

4 0
3 years ago
Other questions:
  • Order the levels of organization from the smallest (1) to the largest (4).
    6·1 answer
  • What is the value for ∆Soreaction for the following reaction, given the standard entropy values? 2 Al (s) + 3Cl2(g) 2AlCl3(s)
    10·2 answers
  • Calculate the frequency of visible light having a wavelength of 486 nm
    7·1 answer
  • The compound Ba(NO3)2 includes _____ oxygen atoms.<br> 6<br> 3<br> 5<br> 2
    5·2 answers
  • The complement protein cascade is the same for the classical pathway, alternative pathway, and lectin pathway after the point in
    15·1 answer
  • If a reaction mixture initially contains 0.195 m so2cl2, what is the equilibrium concentration of cl2 at 227 ???c?
    15·1 answer
  • 10.0 g of Mg are reacted with 95.0 g of I2. If 27.5 g of magnesium iodide are obtained, what is the percent yield
    13·1 answer
  • Sodium will do an ionic bond with
    14·1 answer
  • Please help me, brainest if correct
    7·1 answer
  • Cell theory has 3 parts what are the 3?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!