1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
seropon [69]
3 years ago
13

A hydrogen electron jumps from energy level n = 2 to n = 4 after energy absorption. What will the spectral lines emitted by this

electron look like under a spectroscope?
a. a dark line spectrum
b. white light
c. a continuous spectrum
d. a bright line spectrum
Chemistry
2 answers:
ololo11 [35]3 years ago
3 0
A. a dark line spectrum
Zinaida [17]3 years ago
3 0
I believe the answer is A, but I'm not sure. I would get a second opinion.
You might be interested in
Someone help it’s due today
Kitty [74]

Answer:

All elements are neutral

Explanation:

The plum pudding model of the atom indicated that all elements are neutral. The model was proposed by J.J Thomson after he conducted his experiment on the gas discharge tube.

From the experiment he discovered electrons which he called cathode rays.

Therefore, he suggested the plum pudding model of the atom.

The model describes negatively charge sphere surrounded by positive charges to balance them.

6 0
3 years ago
How many molecules of propane were in the erlenmeyer flask? Avogadro's number is 6. 022 × 10^23 molecules/mol
Ede4ka [16]

3.74×10^{21}

3.74 ×10^{21} molecules of propane were in the erlenmeyer flask.

number of moles of propane can be calculated as moles of propane.

mass of propane =  0.274 g

molar mass of propane = 44.1

So this gives us the value of 6.21×10^{-3} moles of propane

No one mole of propane As a 6.0-2 × 10^{23}

so, 6.21 ×10^{-3} × 6. 022 × 10^23

= 3.74 ×10^{21}

Therefore, molecules of propane were in the erlenmeyer flask is found to be 3.74 ×10^{21}

<h3>What is erlenmeyer flask?</h3>
  • A laboratory flask with a flat bottom, a conical body, and a cylindrical neck is known as an Erlenmeyer flask, sometimes known as a conical flask or a titration flask.
  • It bears the name Emil Erlenmeyer after the German chemist.

<h3>What purpose does an Erlenmeyer flask serve?</h3>
  • Liquids are contained in Erlenmeyer flasks, which are also used for mixing, heating, chilling, incubating, filtering, storing, and other liquid-handling procedures.
  • For titrations and boiling liquids, their sloped sides and small necks make it possible to whirl the contents without worrying about spills.

To learn more about calculating total molecules visit:

brainly.com/question/8933381

#SPJ4

4 0
1 year ago
372 mL is the volume of Aluminum, density is 2.70 g/mL what is the mass in grams
podryga [215]

Answer:

930 g

Explanation:

D = m/V     Multiply both sides by V

m = VD

<em>Data: </em>

V = 372 cm³

D = 2.70 g/cm³

<em>Calculation: </em>

m = 372 × 2.50

m = 930 g

The mass of Al is 930 g.

7 0
3 years ago
Please answer for brainliest and if your answer is correct I'll give extra points. screenshot of the question is below.
ozzi

Concentration - 3

Phase - 1

Catalyst - 4

Surface area - 2

8 0
2 years ago
Read 2 more answers
When a bimetallic bar made of copper and iron strips is heated, the bar bends toward the iron strip. the reason for this is?
Digiron [165]
<span>iron gets hotter before copper.</span>
7 0
2 years ago
Other questions:
  • Electrons spill in shells in the nucleous the closest shell (n=1) can contain the maximum of. Electrons
    9·1 answer
  • A temperature of 55°F is approximately equivalent to 13°C.
    10·2 answers
  • All forms of crystalline carbon have the same structure. True or False
    13·1 answer
  • Please hurry Participants in an informal discussion would most likely
    15·2 answers
  • II. Binding Forces A. Write a brief, one or two sentence, description of each binding force listed below. 1. London dispersion f
    14·1 answer
  • State one use of ammonia in laundry<br>​
    7·1 answer
  • An aqueous solution of calcium hydroxide is standardized by titration with a 0.183 M solution of hydrochloric acid. If 16.6 mL o
    8·2 answers
  • By definition, all acids are harmful for human beings. true or false
    5·2 answers
  • a substance did not change its chemical nature in a reaction. which most likely describes the reaction
    7·2 answers
  • Help please first person to get it right gets my old Netflix account​
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!