All categories

4 years ago

Why is carbon dioxide a pure substance and not a mixture?

1 answer:

5 0

This is because carbon dioxide comes from many things pure if you added anything to it ( like oxygen, or methane ) then It would not be even close to being carbon dioxide anymore...

I hope that this helps you. :)

You might be interested in

What would the molecule CH₄ be classified as?

larisa [96]

Answer:

Alkane

Explanation:

Definition of Alkane "any of the series of saturated hydrocarbons including methane, ethane, propane, and higher members. (google dictionary)"

CH4 is methane.

6 0

4 years ago

Energy must be added to an atom to move a electron from a lower to a higher energy level. This is known as ___________

Phoenix [80]

Answer:

The excitation energy

Explanation:

Excitation energy is the energy needed move an electron from a lower energy level (usually the ground state) to one of higher energy (an excited state).

6 0

4 years ago

What do the craters on the moon’s surface tell us about its past?

jok3333 [9.3K]

Answer:

The moon's surface has been struck with other objects.

Explanation:

Answer 1 - Craters are not a sign of alien life as there is nothing directly showing the crater's are not natural phenomena.

Answer 2 - Craters are (normally) produced by the impact force of a foreign object that is moving quickly and collides with an object of larger size.

Answer 3 - Volcanos form mountains and magma tubes, not craters.

Answer 4 - The formation of mountains does not relate to craters in any meaningful way.

6 0

2 years ago

Which statement is not true about cinder cones? They have very steep sides. They often occur in groups. They are usually less th

sukhopar [10]

They do not produce lava flows

6 0

3 years ago

Read 2 more answers

Hi everyone, I'm really stuck on a question for my uni assignment, i just dont understand chemistry at all, i was wondering if a

sdas [7]

<h3>Answer : 2C + 3H2 -> C2H6</h3>

<h3>Step and explanation</h3>

Condition : graphite + hydrogen gas

Chemical formula : C + H2

Reaction formula :

C + H2 -> C2H6

#First, you see the number of atom

•Product

C = 1

H = 2

•Reactant

C = 2

H = 6

#Note that, in a chemical reaction both number of each atom in product must be equal in reactant so, you think what number you need to put Infront of the chemical formula so that the number of atom equal

2C + 3H2 -> C2H6

#Now check again

•Product

C = 2

H = 6

•Reactant

C = 2

#Now, its equal. The bold one is the balance chemical reaction

<h3>Note (just incase u dont know)</h3>

Reactant -> product (the thing you get after reaction)

7 0

3 years ago