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4 years ago

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The equation below shows lithium reacting with nitrogen to produce lithium nitride. 6Li + N2 2Li3N If 12 mol of lithium were rea

cted with excess nitrogen gas, how many moles of lithium nitride would be produced? 4.0 mol 6.0 mol 12 mol 36 mol

2 answers:

Andreyy894 years ago

5 0

Answer:

4 mol of lithium nitride would be produced

Explanation:

6Li + N2 → 2Li3N

This equation means that 6 mol of lithium are reacted with 1 mol of nitrogen to make, 2 mol of lithium nitride.

So this is the rule of three to find out, how many moles of lithium nitride are been made, from 12 mol of Li.

6 Li _____ 2 Li3N

12 Li ________ (12. 2) / 6 = 4 moles

Anestetic [448]4 years ago

5 0

Answer:

4 mol of lithium nitride would be produced

Explanation:

6Li + N2 → 2Li3N

it means that 6 mol of lithium are reacted with 1 mol of nitrogen to make, 2 mol of lithium nitride.

this is the rule of three to find out, how many moles of lithium nitride are been made, from 12 mol of Li.

6 Li _____ 2 Li3N

12 Li ________ (12. 2) / 6 = 4 moles

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Read 2 more answers

The equation for photon energy, E, is E=hc/λ

Leni [432]

Answer:

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Explanation:

The wavelength is defined for every periodic wave, that is, for the type of wave that repeats itself with exactly the same shape every given interval of time. It is the distance between two points from which the wave repeats.

Radiation is the emission, propagation and transfer of energy in any medium in the form of electromagnetic waves or particles.

The energy carried by electromagnetic radiation travels by waves. This energy is transmitted grouped in small "quanta" of energy called photons. The energy of a photon is measured in Joules (J) and is

$E=\frac{h*c}{wavelength}$

Being:

E=3.92×10⁻¹⁹ J
h= 6.626×10⁻³⁴ J⋅s (Planck's constant)
c = 2.99×10⁸ m/s (the speed of light)
wavelength=?

and replacing:

$3.92*10^{-19}J =\frac{6.626*10^{-34}J.s*2.99*10^{8}\frac{m}{s} }{wavelength}$

you get:

$wavelength =\frac{6.626*10^{-34}J.s*2.99*10^{8}\frac{m}{s} }{3.92*10^{-19}J}$

wavelength= 5.054*10⁻⁷ m

<u><em>The wavelength, λ, of a photon that has an energy of E = 3.92×10⁻¹⁹ J is 5.054*10⁻⁷ m</em></u>

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