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
Norma-Jean [14]
3 years ago
11

What makes up 90 percent of interstellar gas? hints what makes up 90 percent of interstellar gas? hydrogen carbon dioxide helium

carbon monoxide?
Chemistry
1 answer:
masha68 [24]3 years ago
7 0
Despite being an extremely rare gas on Earth, hydrogen is the most common element in the universe. This is due to the fact that hydrogen is the fuel for stars, as it undergoes the fusion nuclear reaction to form helium and release the energy to sustain the star. Therefore, the answer to this question is hydrogen.
You might be interested in
Which of the following is not correctly paired with its dominant type of intermolecular forces? 1. SiH4, instantaneous dipoles 2
Luda [366]

Answer:

Option 4. There's no hydrogen bonding between HBr molecules at all.

Explanation:

<h3>SiH₄</h3>

SiH₄ molecules are tetrahedral and symmetric. Dipoles due to the polar Si-H bonds balance each other. SiH₄ molecules are nonpolar. Only instantaneous dipoles are possible between those molecules.

<h3>C₆H₆ Benzene</h3>

Similar to SiH₄, benzene is symmetric. Dipoles due to the weakly polar C-H bonds balance each other. Benzene molecules are nonpolar. Only instantaneous dipoles are possible between those molecules.

<h3>NH₃</h3>

There are two conditions for hydrogen bonding to take place:

  • H atoms are directly bonded to a highly electronegative element: Nitrogen, Oxygen, or Fluorine.
  • There is at least one lone pair of electrons nearby.

Consider the Lewis structure of NH₃. There are three H atoms in each NH₃ molecule. Each of the three H atoms is bonded directly to the N atom with a highly polar N-H bond.  Also, there is a lone pair of electrons on the N atom. Hydrogen bonding will take place between NH₃ molecules.

NH₃ is a relatively small molecule. As a result, hydrogen bonding will be the dominant type of intermolecular force between NH₃ molecules.

<h3>HBr</h3>

There are three lone pairs on the Br atom in each HBr molecule. However, no H atom is connected to any one of the three highly electronegative elements: N, O, or F. The Br atom isn't electronegative enough for the H atom to form hydrogen bonding. HBr molecules are polar. As a result, the dominant type of intermolecular forces between HBr molecules will be dipole-dipole interactions (A.k.a. permanent dipole.)

<h3>CaO</h3>

Calcium is a group 2 metal. Oxygen is one of the three most electronegative nonmetal. (Again, the most electronegative elements are: Nitrogen, Oxygen, and Fluorine.) As a main group metal, Ca atoms tend to lose electrons and form positive ions. Oxygen will gain those electrons to form a negative ion. As a result, CaO will be an ionic compound full of Ca²⁺ and O²⁻ ions. Forces between ions with opposite charges are called ionic bonds.

7 0
3 years ago
1. Which population of organisms depends on eating another population of organisms for
Aloiza [94]

Answer:

predation

Explanation:

Predation An interaction in which one organism kills another for food. Prey An organism that is killed and eaten by another organism.

8 0
3 years ago
Why concentrated acid is hazardous material​
Setler [38]

Answer:

Here's it.

Explanation:

Concentrated acids are very corrosive and dangerous chemicals that are commonly encountered in the laboratory. ... Concentrated acids may be fatal if inhaled; and can cause severe eye and skin burns, severe respiratory and digestive tract burns. Contact with other materials may cause a fire.

5 0
3 years ago
Read 2 more answers
How many moles of Fe2+ are there in a 2.0g sample that is 80% by mass of FeCl2?
KIM [24]

Answer:

A walkthrough for a sample titration calculation for all levels of chemistry. ... Now that gives us the moles of Fe2+, but it's asking for how many grams there are. ... The molar mass of iron is about 55.8, so we'll just put that.

অনুপস্থিত: 80%

Explanation:

5 0
2 years ago
What does a Mitochondrion do
Slav-nsk [51]

Answer:

Explanation:

Power house of the cell.

It carries the DNA strand from the ribosome

3 0
3 years ago
Read 2 more answers
Other questions:
  • Would you expect to find clear weather or clouds near fargo, north Dakota​
    7·2 answers
  • Goal: Create a project that illustrates knowledge of the rock cycle and the three types of rocks. Step 1: Writing about the Rock
    13·2 answers
  • A gas cylinder contains 2.0 mol of gas X and 6.0 mol of gas Y at a total pressure of 2.1 atm. What is the partial pressure of ga
    14·2 answers
  • 1L= 1,000,000,000,000 _L
    12·1 answer
  • A sample of water in a sealed flask at 298 k is in equilibrium with its vapor. this is an example of
    6·1 answer
  • Suggest why the relative atomic mass of chlorine is not a whole number
    8·1 answer
  • Look at a list of the elements or a periodic table. Identify some pairs of elements that you have heard of that have similar pro
    6·1 answer
  • Which of the following statements is always true? a. The rate law can be determined from the stoichiometric equation. b. The rat
    7·1 answer
  • Scientists classify organisms into three domains and six kingdoms. In which
    9·1 answer
  • ☆Only need information for problem 3 but you need to know the information from problem 2 to get answer 3☆
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!