All categories

2 years ago

1. What is the frequency of light having a wavelength of 406 nm?

Chemistry

1 answer:

morpeh [17]2 years ago

4 0

Answer:

1. frequency = 7.39 * 10¹⁴ Hz

2. wavelength = 1.44 * 10⁸ nm

Explanation:

The speed, frequency and wavelength of waves are related by the formula;

speed = wavelength * frequency

1. wavelength of light = 406 nm = 4.06 * 10⁻⁷ m

speed of light is a constant = 3.0 * 10⁸ m/s

From the formula above, frequency = speed / wavelength

therefore, frequency = (3.0 * 10⁸ m/s) / 4.06 * 10⁻⁷ m

frequency = 7.39 * 10¹⁴ Hz

2. From the equation above, wavelength = speed/frequency

speed of radiation = 3.0 * 10⁸ m/s

frequency = 2.09 * 10⁹ Hz or 2.09 * 10⁹ s⁻¹

therefore, wavelength = (3.0 * 10⁸ m/s) / 2.09 * 10⁹ s⁻¹

wavelength = 1.44 * 10⁸ nm

You might be interested in

What is the osmotic pressure, in torr, of a 3.00% solution of NaCl in water when the temperature of the solution is 45 ºC? Enter

Anit [1.1K]

213034 torr is the osmotic pressure.

Explanation:

osmotic pressure is calculated by the formula:

osmotic pressure= iCrT

where i= no. of solute

c= concentration in mol/litre

R= Universal Gas constant

T = temp

It is given that solution is 3% which is 3gms in 100 ml.

let us calculate the concentration in moles/litre

3gm/100ml*1000ml/1L*1mol NaCl/55.84g NaCl

= 5.372 gm/litre

Putting the values in the formula, Temp in Kelvin 318.5K

osmotic pressure= 2*5.372*0.083 * 318.5 Gas constant 0.083

= 284.023 bar or 213018 torr. c= 5.372 moles/L

i=2 for NaCl

4 0

3 years ago

For 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g), if you begin with 16.00 g ammonia and excess oxygen, how many grams of water will be ob

iragen [17]

12.7 grams approximately

8 0

3 years ago

Calculate the volume of acetone with the same mass as 15.0 mL of mercury. The density of mercury is 13.59 g/mL. The density of a

lubasha [3.4K]

Answer:

Volume of acetone = 257.4 mL

Explanation:

Density = mass / volume

Density Hg = Mass Hg / Volume Hg

13.59 g/mL = Mass Hg / 15 mL Hg

13.59 g/mL . 15 mL = Mass Hg → 203.85 g

This is the mass of acetone

Density acetone = Mass acetone / Volume acetone

0.792 g/mL = 203.85 g / Volume of acetone

Volume of acetone = 203.85 g / 0.792 g/mL

Volume of acetone = 257.4 mL

3 0

3 years ago

Read 2 more answers

What is the best definition of polar covalent bond?

kozerog [31]

A polar covalent bond is a specific type of covalent bond, where the distribution or the sharing of valence electrons among the atoms involved in the bond are not the same and or equal. There is a greater pull of electron density to one atom than that of the other causing atoms to experience a partial positive and negative charge.

The electronegativity difference is typically large between the atoms that show polar bonding.

8 0

3 years ago

Read 2 more answers

What atom is 10ne20

maks197457 [2]

$^{20}_{10}\text{Ne}$ .

That's a neon-20 atom.

<h3>Explanation</h3>

Here's the symbol of neon-20, showing both its atomic number and its mass number.

$^{20}_{10}\text{Ne}$ .

Ne is the chemical symbol of neon.
The number 20 in the upper-left corner is the mass number of this atom.
The number 10 in the lower-left corner is the atomic number of this atom.

How to name this atom?

Start with the name of the element: "neon" for Ne, atomic number 10.
Write a hyphen: "-" with no space around.
Write the mass number: "20" right next to the hyphen.

What about the atomic number? The atomic number is unique for each element. It is implied in the first part of the name. For example, the atomic number of a "neon-20" atom is always going to be 10 since the atomic number of neon is 10. That number is printed on the periodic table. However, the mass number may vary between isotopes of each element. That number needs to be specified.

The name of this atom is neon-20.

5 0

3 years ago