Calculate the frequency

2 answers:

8 0

Answer: 8.90 x 10¹⁴ Hz


Explanation:


1) Frequency (f) and wavelength (λ) are inversely related.


2) The equation is: f = c / λ, where c is the speed of light


3) c = 3 x 10⁸ m/s in vacUum


4) To make the calculations you need yo use the conversion between nanometers and meters:


1 meter = 10⁹ nanometer

5) Calculations:

f = 3 x 10⁸ m/s / 337.1 x 10⁻⁹ m = 8.90 x 10¹⁴ Hz


Hz is hertz, the SI unit for frequency and it means cycles per second, that is number of waves per second.

Ber [7]3 years ago

3 0

Given: wavelength of Nitrogen laser (∧) = 337.1 nm = 337.1 X 10^-9 m

We know that, Energy of photon (E) = hc/∧ = hv
where, v = frequency of photon and c = speed of light = 3 X 10^8 m/s

Thus, v = c/∧ = (3 X 10^8)/ (337.1 X 10^-9) = 8.899 X 10^14 s-1.

Answer: Frequency of nitrogen laser = 8.899 X 10^14 s-1.

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At a temperature of 280 K, the gas in a cylinder has a volume of 20.0 liters. If the volume of the gas is decreased to 10.0 lite

seraphim [82]

To solve this we assume that the gas inside is an ideal gas. Then, we can use the ideal gas equation which is expressed as PV = nRT. At a constant pressure and number of moles of the gas the ratio T/V is equal to some constant. At another set of condition of temperature, the constant is still the same. Calculations are as follows:

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8 0

2 years ago

Read 2 more answers

Given the following equation: 2K + Cl2 -> 2KCl How many grams of KCl is produced from 4.00 g of K and excess Cl2?

Thepotemich [5.8K]

Answer:

42.65g

Explanation:

Given parameters:

Mass of K = 4g

Unknown: Mass of KCl

Solution:

Complete equation of the reaction:

2K + Cl₂ → 2KCl

To solve this problem, we know that the reactant in short supply is potassium K and this dictates the amount of products that would be formed. The chlorine gas is in excess and we can't use it to determine the amount of product that would form.

Now, we work from the known to the unknown. Since we know the mass of K given in the reaction, we can simply find the molar relationship between the reacting potassium and the product. We simply convert the mass to mole and compare to the product. From there we can find the mass of KCl that would be produced.

Calculating number of moles of K

Number of moles = $\frac{mass}{molar mass}$