How do scientists calculate the energy and frequency of photons?

1 answer:

4 0

That photon's energy is equal to Planck 's constant, multiplied by the light frequency, h is always 6.63* 10^ -34 Joule seconds and the frequency is 6* 10^ 14 Hz.

You might be interested in

4. Define power and explain how to determine power.

Ratling [72]

The rate of doing work is called power of an object.
It is also defined as the work done by an object per unit time. Mathematically, its formula is given by :
, W is work done and t is time taken.
The SI unit of power is watts and its commercial unit is kWh.
1 watt = J/s or N-m/s.

5 0

2 years ago

Sodium azide decomposes rapidly to produce nitrogen gas.

brilliants [131]

Answer:

156 g

Explanation:

Let's consider the following reaction.

2 NaN₃(s) → 2 Na(s) + 3 N₂ (g)

We can find the moles of N₂ using the ideal gas equation.

P × V = n × R × T

1.50 atm × 60.0 L = n × (0.08206 atm.L/mol.K) × 305 K

n = 3.60 mol

The molar ratio of N₂ to NaN₃ is 3:2. The moles of NaN₃ are:

3.60 mol N₂ × (2 mol NaN₃ / 3 mol N₂) = 2.40 mol NaN₃

The molar mass of NaN₃ is 65.01 g/mol. The mass of NaN₃ is:

2.40 mol × 65.01 g/mol = 156 g

4 0

3 years ago

If oxygen with an electronegativity of 3.5 were to make a chemical bond with lithium, electronegativity of 1.0, what kind of bon

sergejj [24]

Answer:

Ionic.

Explanation:

Elements with higher electronegativity values are better at attracting electrons in a chemical bond.

A chemical bond is considered "ionic" if the electronegativity difference between the two bonding atoms is greater than $1.8$ .
Otherwise, this chemical bond is considered "covalent".

In this example, the difference between the electronegativity of oxygen and lithium is $3.5 - 1.0 = 2.5$ . Since $2.5 > 1.8$ , the bond between the two elements would likely be ionic.

It is possible to reach the same conclusion based on the fact that lithium is a metal while oxygen is a nonmetal. When metal elements react with non-metal elements, the product is typically an ionic compound- with ionic bonds between the atoms.

6 0

2 years ago

State whether the following are elements, compounds or mixtures

Vadim26 [7]

Answer:

Explanation:

3 0

2 years ago

Read 2 more answers

What is the volume (in ml) of a 12.9 g piece of metal with a density of 7.25 g/cm3?

Leto [7]

Hey there:

1 cm³ = 1 mL

D = m / V

7.25 = 12.9 / V

V = 12.9 / 7.25

V = 1.779 cm³