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
postnew [5]
3 years ago
10

A line in the hydrogen spectrum occurs at 434 nm. what is the frequency of this radiation in sec -1

Chemistry
1 answer:
Taya2010 [7]3 years ago
7 0
The lines occurring in an emission spectrum are all electromagnetic waves, which means that their speed in a vacuum is
3 x 10⁸ m/s


We can use the equation,
v = fλ
which relates the velocity of a wave to the frequency and wavelength. Substituting values,

3 x 10⁸ = f * 434 x 10⁻⁹
f = 6.91 x 10¹⁴ Hz

The frequency of the wave will be 6.91 x 10¹⁴ oscillations per second.
You might be interested in
using the soubility curve what is the solubilityof nh4cl in 10 mL of water at a temperature of 60 degrees Celsius​
lukranit [14]

Answer:

Please, see attached two figures:

  • The first figure shows the solutility curves for several soluts in water, which is needed to answer the question.

  • The second figure shows the reading of the solutiblity of NH₄Cl at a temperature of 60°C.

  • Answer: <u>5.5g</u>

Explanation:

The red  arrow on the second attachement shows how you must go vertically from the temperature of 60ºC on the horizontal axis, up to intersecting curve for the <em>solubility</em> of <em>NH₄Cl.</em>

From there, you must move horizontally to the left (green arrow) to reach the vertical axis and read the solubility: the reading is about in the middle of the marks for 50 and 60 grams of solute per 100 grams of water: that is 55 grams of grams of solute per 100 grams of water.

Assuming density 1.0 g/mol for water, 10 mL of water is:

            10mL\times 1.0g/mL=10g

Thus, the solutibily is:

      10gWater\times 55gNH_4Cl/100gWater=5.5gNH_4Cl

5 0
3 years ago
Smooth muscle myosin is a motor protein that plays a crucial role in the contraction of smooth muscle. If this protein has a mol
zysi [14]

Answer: Thus the mass, in grams, of 27 moles of smooth muscle myosin is 12960000 grams

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to the molecular mass, occupies 22.4 L at STP  contains avogadro's number (6.023\times 10^{23}) of particles.

Molecular mass of protein = 480,000 g/mol

Thus 1 mole of protein weighs = 480,000 g

So 27 moles of protein weighs = \frac{480,000}{1}\times 27=12960000g

Thus the mass, in grams, of 27 moles of smooth muscle myosin is 12960000 grams

6 0
4 years ago
Why all stable elements are not unreactive?????? ​
pickupchik [31]

Answer:

Noble gases are the least reactive of all elements

Explanation:

because they have eight valence electrons, which fill their outer energy level

7 0
4 years ago
Read 2 more answers
A waste treatment pond is 50 m long and 25 m wide, and has an average depth of 2 m. The density of the waste is 75.3lbm/ft^3 .Ca
umka21 [38]

Answer:

W = 6.65 \cdot 10^{6} lbf

Explanation:

To find the weight (W) of the pond contents first we need to use the following equation:

W = m\cdot g   (1)

Where m the mass and g is the gravity  

Also, we have that the mass is:

m = \rho*V  (2)    

Where ρ is the density and V the volume

We cand calculate the volume as follows:

V = L*w*d   (3)

Where L is the length, w is the wide and d is the depth  

By entering equation (2) and (3) into (1) we have:

W = \rho*L*w*d*g

W = 75.3 lbm/ft^{3}*50 m*25 m*2 m*9.81 m/s^{2}  

W = 75.3 lbm/ft^{3}*\frac{(1 ft)^{3}}{(0.3048 m)^{3}}*\frac{0.454 kg}{1 lbm}*50 m*25 m*2 m*9.81 m/s^{2} = 2.96 \cdot 10^{7} N}*\frac{0.2248 lbf}{1 N} = 6.65\cdot 10^{6} lbf              

Therefore, the weight of the pond is 6.65x10⁶ lbf.

I hope it helps you!

6 0
4 years ago
Identify impacts of air pollution
Valentin [98]
Heart disease, lung cancer and respiratory diseases
7 0
2 years ago
Read 2 more answers
Other questions:
  • To make an object in motion stop, you need to _____.
    15·1 answer
  • Explain why the melting and boiling points of covalent compounds are usually lower than those of ionic
    12·1 answer
  • Defintion of isometry
    15·1 answer
  • Diagonal lines in the graph represent the temperature of the substance is ___.
    7·1 answer
  • True or False: All cells have different basic chemical composition. *<br> True<br> False
    14·2 answers
  • Determinar los mililitros de solución 0.5 Normal de NaCl que se pueden preparar a partir de 3 L de solución de cloruro de sodio
    15·1 answer
  • How many formula units are in 4.52 moles of H3SO3?<br> Type your answer
    7·1 answer
  • In a separate location, take notes from the sources you’ve identified. The notes will provide details for your paper. While taki
    14·1 answer
  • HELP! THIS IS A TIMED QUIZ!!
    6·1 answer
  • What is the mass of oxygen gas in a 12.2 L
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!