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
Mila [183]
2 years ago
12

What two elements are used to make a laser pen light?

Chemistry
1 answer:
irina1246 [14]2 years ago
6 0

Answer:

Helium and Neon

Explanation:

You might be interested in
The majority of energy used in industrialized countries is produced using renewable resources.
vaieri [72.5K]

Answer:

The answer is FALSE

Explanation:

I took the test and it was false,

also if it was true then in industrialized countries would be more eco-friendly and there wouldn't be a huge hole in our ozone layer. and no more wars over oil.

7 0
3 years ago
The chemical equations in model 1 contain the phase notations (s), (l), (g), and (aq). match each symbol with its meaning.
Sever21 [200]

Reaction equations contains symbols which show the physical state of the reactants and products.

<h3>What is a chemical equation:</h3>

A chemical equation is an expression that shows the interaction of reactants to yield products. Usually, symbols such as (s), (l), (g), and (aq) are used to show the state of the reactants and products.

The following are the respective meanings of these symbols;

  • (s) - solid
  • (l) - Liquid
  • (g) - gas
  • (aq) - dissolved in water

Learn more about reaction equations: brainly.com/question/1170557

8 0
2 years ago
Can anyone help me with this?
Scrat [10]

Explanation:

c2H5

|

cH3 _ c _ c H2 _ c H3

|

c2H5

cH3

|

cH3_ cH _ cH_ cH2_ cH3

|

cH3

5 0
2 years ago
Ammonia will decompose into nitrogen and hydrogen at high temperature. An industrial chemist studying this reaction fills a flas
valentina_108 [34]

Answer:

Kp = 0.022

Explanation:

<em>Full question: ...With 2.3 atm of ammonia gas at 32. °C. He then raises the temperature, and when the mixture has come to equilibrium measures the partial pressure of hydrogen gas to be 0.69 atm. </em>

<em />

The equilibrium of ammonia occurs as follows:

2NH₃(g) ⇄ N₂(g) + 3H₂(g)

Where Kp is defined as:

Kp = \frac{P_{N_2}P_{H_2}^3}{P_{NH_3}^2}

<em>Where P represents partial pressure of each gas.</em>

<em />

As initial pressure of ammonia is 2.3atm, its equilibrium concentration will be:

P(NH₃) = 2.3atm - 2X

<em>Where X represents reaction coordinate</em>

<em />

Thus, pressure of hydrogen and nitrogen is:

P(N₂) = X

P(H₂) = 3X.

As partial pressure of hydrogen is 0.69atm:

3X = 0.69

X = 0.23atm:

P(NH₃) = 2.3atm - 2(0.23atm) = 1.84atm

P(N₂) = 0.23atm

P(H₂) = 0.69atm

Kp = \frac{0.23atm*0.69atm^3}{1.84atm^2}

<h3>Kp = 0.022</h3>
8 0
3 years ago
Please help me with these two questions
ANEK [815]
What is the question?
8 0
3 years ago
Other questions:
  • What happen to the temperature of ice when rock salt is added
    13·2 answers
  • HEYYY FAM IS THIS RIGHT
    9·1 answer
  • How do atoms form a new substance?
    12·2 answers
  • 1. Calculate the volume of a 0.500mol sample of gas at<br>STP.​
    15·1 answer
  • Which element does this atom represent?
    13·1 answer
  • What is relative mass of an atom
    6·1 answer
  • hello my BEANS i want to know if u r a girl or a boy so if i call u a boy and u r a girl i am not a bad person i am 13 and i am
    7·2 answers
  • How do you find the significant figure of 505kg-450.25kg
    14·1 answer
  • Which shared derived characteristic do reptiles, marsupials, and dogs have?
    8·2 answers
  • How can you determine the number of shells in an atom of a certain element, based
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!