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qwelly [4]
3 years ago
10

How are the different colors generated by the flames? A. proton transitions B. reactions between different atoms C. electronic t

ransitions
Chemistry
1 answer:
attashe74 [19]3 years ago
4 0

Answer: C

Explanation:

According to Neils Bohr, atoms contain electrons which are arranged in energy levels. The energy levels proceed from the lowest to the highest. When energy is supplied to an atom,it moves from lower to higher energy levels. The higher energy level is known as the excited state. Excited states are short lived and atoms quickly return to ground state with emission of the absorbed energy in the form of visible light. This visible light must have one of the seven colours observed in the visible spectrum; Red, orange, yellow, indigo, blue, green, violet. Energy required for this excitation is supplied by heating the substance in a flame.

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The table above shows data from a laboratory experiment in which Andrew measured conclusion from this experiment?
puteri [66]

We know that the particles in a matter have energy. They have kinetic energy, potential energy, chemical energy, electrical energy etc.

When we give heat to a matter it gains energy and there is an increase in its internal energy. Or we can say that particles in a matter have more energy at higher temperature than particles in a matter at low temperature

As ice is formed below zero degree celsius so the particles in ice must have lesser energy than water at higher temperature.

Thus true statement will be

The particles in boiling water have more energy than the particles in ice water do.


3 0
4 years ago
The volume occupied by 1.5 mole of gas at 35°C and 2.0 atmosphere of pressure is blank liters
Aneli [31]

Answer: 18.97 L

Explanation:

This can be solved by the Ideal Gas equation:

P.V=n.R.T  

Where:  

P=2 atm is the pressure of the gas  

V is the volume of the gas  

n=1.5 mole the number of moles of gas  

R=0.0821\frac{L.atm}{mol.K} is the gas constant  

T=35\°C+273.15=308.15 K is the absolute temperature of the gas in Kelvin

Finding V:

V=\frac{nRT}{P}

V=\frac{(1.5 mole)(0.0821\frac{L.atm}{mol.K})(308.15 K)}{2 atm}

V=18.97 L

Therefore:

The volume occupied by 1.5 mole of gas at 35°C and 2.0 atmosphere of pressure is <u>18.97</u> liters

7 0
3 years ago
Nitrogen-fixing bacteria convert atmospheric nitrogen into forms of nitrogen that living things can use.
guapka [62]

Answer:

I know im late but its true

Explanation:

E2020 edge

3 0
3 years ago
Hi guys, my question is:
guapka [62]

Answer:

See Explanation Below

Explanation:

A) The rate law can only be on the reactant side and you can only determine it after you get the net ionic equation because of spectators cancelling out. So in this case the rate law is k=[CH3Br]^1 [OH-]^1. The powers are there because the rxn is first order.  

B) Since the rxn is first order anything you do to it will be the exact same "counter rxn" per say so since you are decreasing the OH- by 5 the rate will decease by 5

C) The rate will increase by 4 since you are doubling both you have to multiply them both.

8 0
3 years ago
A student collects 285mL of nitrous oxides gas at 15.8°C and a pressure of 1.05atm. The next day, the same sample occupies a vol
Natalka [10]

Answer:

1.01 atm  

Step-by-step explanation:

To solve this problem, we can use the <em>Combined Gas Laws</em>:

p₁V₁/T₁ = p₂V₂/T₂     Multiply each side by T₂

p₁V₁T₂ = p₂V₂           Divide each side by V₂

     p₂ = p₁ × V₁/V₂ × T₂/T₁

Data:

p₁ = 1.05 atm; V₁ = 285 mL; T₁ = 15.8 °C

p₂ = ?;            V₂ = 292 mL; T₂ =  11.2 °C

Calculations:

(a) Convert <em>temperatures to kelvins </em>

T₁ = (15.8+273.15) K = 288.95 K

T₂ = (11.2+273.15) K = 284.35 K

(b) Calculate the <em>pressure </em>

p₂ = 1.05 atm× (285/292) × (284.35/288.95)  

   = 1.05 atm × 0.9760 × 0.9840

   = 1.01 atm

4 0
3 years ago
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