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user100 [1]
3 years ago
12

why do these energy levels mean that the atom will show an emission spectrum of individual lines rather than a continuous spectr

um of emitted lights?
Chemistry
1 answer:
Vilka [71]3 years ago
8 0

Answer:

It is a fundamental concept that atomic spectra are discontinuous the electron's energy levels are quantized which is a quantum mechanics concept that a system is limited to certain energy states which depends on the particular system being refereed to

Explanation:

Atomic electrons posses only specific energy levels with nothing in between those levels, it can be excited to a higher energy level by gaining the required energy or lose energy in quantized packets to drop to a lower energy level hence the discontinuous spectral lines

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Why does blowing carbon dioxide gas into aqueous barium hydroxide reduce?
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<span>If one chooses to blow carbon dioxide gas into aqueous barium hydroxide it will reduce. This happens because the ions become removed from the solution and in turn this decreases the conductivity of it.</span>
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4 years ago
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A sample of tin (Cp = 0. 227 J/g•°C) is placed in a freezer. Its temperature decreases from 15. 0°C to â’10. 0°C as it rele
pshichka [43]

Taking into account the definition of calorimetry, the mass of the sample is 478.41 grams.

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

Sensible heat is defined as the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).

So, the equation that allows to calculate heat exchanges is:

Q = c× m× ΔT

where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

In this case, you know:

  • Q= -543 J because the energy is releases
  • c= 0.227 \frac{J}{gC}
  • m= ?
  • ΔT= Tfinal - Tinitial= 10 C - 15 C= -5 C

Replacing:

-543 J= 0.227 \frac{J}{gC}× m× (-5 C)

Solving:

m=\frac{-543 J}{0.227 \frac{J}{gC}x(-5 C)}

<u><em>m=478.41 grams</em></u>

In summary, the mass of the sample is 478.41 grams.

Learn more about calorimetry:

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4 0
3 years ago
Consider the following reaction:2NOBr(g) 2NO(g) + Br2(g)If 0.412 moles of NOBr(g), 0.678 moles of NO, and 0.224 moles of Br2 are
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Answer: K_c=0.0587M

Explanation: The given chemical reaction is:

2NOBr(g)\rightleftharpoons 2NO(g)+Br_2(g)

Equilibrium constant (Kc) in general is written as:

K_c=\frac{[products]}{[reactants]}

Note:- Coefficients are written as their powers

So, the Kc expression for the above reaction will be:

K_c=\frac{[NO]^2[Br_2]}{[NOBr]^2}

Equilibrium moles are given for all of them. Let's divide the moles by given liters to get the concentrations.

[NOBr]=\frac{0.412mol}{10.3L}   = 0.040 M

[NO]=\frac{0.678mol}{10.3L}   = 0.0658 M

[Br_2]=\frac{0.224mol}{10.3L}   = 0.0217 M

Plug in the values in the equilibrium expression to calculate Kc.

K_c=\frac{(0.0658M)^2(0.0217M)}{(0.040M)^2}

K_c=0.0587M

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If there are no chemical controls which can be implemented at your worksite, what can you do to protect yourself?.
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