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Anastaziya [24]
3 years ago
10

HELPPPPP PLEASSEEEEE

Chemistry
1 answer:
timurjin [86]3 years ago
4 0

Answer:

  • Dalton was first with the modeling
  • They soon followed so the answer is D: rutherford and bohr modeled their experiments
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Sodium burns violet in a flame. What is the energy of this blue light if a photon released has a wavelength of 413nm
ludmilkaskok [199]

According to Einstein the energy of photon is given by the equation,

E = hν = h . c/λ

where h is Planck's constant, c is the speed of light, ν is the frequency of light and λ is the wavelength of light.

Given, wavelength of photon = 413 nm = 413 x 10⁻⁹ m

Conversion factor: 1 nm = 10⁻⁹ m

c = 3 x 10⁸ m/s

h = 6.626× 10⁻³⁴ J.s

Substituting the data into the equation we get,

E = h . c/λ

E = 6.626× 10⁻³⁴ J.s x (3 x 10⁸ m/s) / 413 x 10⁻⁹ m

E = 4.8 x 10⁻¹⁹ J

The energy of this blue light is  4.8 x 10⁻¹⁹ J

7 0
4 years ago
Typically ____
MArishka [77]

Answer:

Protons

Explanation:

Typically protons cannot be removed from the atom. Removing protons from an atom will completely change the atom as it will become another element entirely.

In an atom, protons are held by strong nuclear forces.

  • Within an atom, protons are the positively charged particles.
  • Together with the neutrons, they are found in the nucleus of an atom.
  • The number of protons within an atom is the atomic number of the atoms and it determines the nature and type of atom it is.
  • Protons cannot be removed from an atom due to the strong binding force holding them together in place.
4 0
3 years ago
Read 2 more answers
In order to make 1 batch of cookies it requires 2 cups flour, 3 eggs, and 1 cup sugar. What would be the coefficients for the fl
DanielleElmas [232]
20 cups of flour, 30 eggs, and 10 cups of sugar
4 0
3 years ago
How does the temperature of absolute zero relate to the kinetic energy of a substance's molecules?
skelet666 [1.2K]

Answer:

I will say D. The molecules become arranged into regular cubic arrangement. but i'm not 100% sure

Explanation:

8 0
3 years ago
C3Hg + 02 → CO2 + H2O
fredd [130]

Answer:

4

Explanation:

The following equation, which depicts the combustion of propane, is given in this question as follows:

C3H8 + 02 → CO2 + H2O

However, this equation is not yet BALANCED because the number of atoms of each element is not the same on the reactant and product side. To balance the equation, we make use of COEFFICIENT to ensure that the number of atoms of each element on both side correlates.

The balanced equation is as follows:

C3H8 + 502 → 3CO2 + 4H2O

Therefore, the coefficient for water (H2O) after balancing the equation is 4.

8 0
3 years ago
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