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Alika [10]
2 years ago
15

What are some signs that a chemical change takes place when a firework explodes?Matter is destroyedLight is producedHeat is prod

ucedThe chemical composition is not changed
Chemistry
2 answers:
dangina [55]2 years ago
7 0

Answer:

Light and heat produced

Explanation:

Ray Of Light [21]2 years ago
5 0
<h2>Answer;</h2>

Light is produced and heat is produced

<h2>Explanations</h2>

Chemical changes occurs when substances react to form new products. This reaction can be in form of a decomposition reaction.

During fireworks explosion, there is a reaction between charge of gunpowder which is been ignited with a fuse to produce a spark that leads to explosion.

The explosion leads to production of light and heat. Hence we can conclude that some signs that a chemical change takes place when a firework explodes is light is produced and heat is produced

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A special layer of dermal cells are found on the top side of leaves. What level of organization would it belong to
Dmitry [639]

Answer:

Tissue level of organization

Explanation:

The various levels of the organization of life are as follows:

Cells: a cell is the basic unit of ife

Tissues; A tissue is a group of cells with a common origin. performing similar functions.

Organ: an organ is a group of tissues with varied or similar function that work together to perform a specific function.

System: a system is a group of different organs that work together in the body to perform a specific function.

Since, the leaf is an organ in the plant that performs the function of photosynthesis, the group of dermal cells found on the leaf are in the tissue level of organization, they perform the function of protection for the leaf.

5 0
3 years ago
4. The Universal Space Agency wants to know the results of your investigation. Write your report to the lead chemist, explaining
AnnZ [28]

Answer:

I would answer but thats a lot of work. I understand why you didnt do it yourself.

5 0
3 years ago
What Group is Zn (zinc) in?<br> O A. 4<br> O B. 2A<br> O C. 12<br> O D. 30
Oxana [17]
I believe it’s (C.12)
3 0
3 years ago
The tetrahedral arrangement of bonds formed by carbon and its relevance In the interaction of biomolecules
Vikentia [17]

Answer:

Due to the presence of 4 valence electrons.

Explanation:

The tetrahedral arrangement of bonds formed by carbon and its relevance In the interaction of biomolecules occurs because the carbon atom has four electrons in their outermost shell and the four hydrogens has one electron each which result is a total of eight electrons distributed in four bonding orbitals making the structure of tetrahedral and the bond angles between these carbon atoms is approximately 109.5 degree.

8 0
3 years ago
How many molecules are in a 22.8 gram sample of Methane?
vampirchik [111]
The molecular weight of methane (CH4) is 16.04 g / mol.
Therefore:

22.8 grams x (mol) / 16.04 g =

(Grams unit cancel out)

1.42 mol
4 0
3 years ago
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