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Ede4ka [16]
3 years ago
7

Why is ice melting a physical change?

Chemistry
1 answer:
den301095 [7]3 years ago
4 0

Answer:As an ice cube melts, its shape changes as it acquires the ability to flow. However, its composition does not change. Melting is an example of a physical change .

Explanation:

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2N2 + 3H2 → 2NH3
denis23 [38]

There are two N≡N bonds and three H–H  bonds are in reactants.

Given:

The reaction between nitrogen gas and hydrogen gas.

2N_2+3H_2\rightarrow 2NH_3

To find:

Bonds on the reactant side

Solution:

2N_2+3H_2\rightarrow 2NH_3

Reactants in the reaction = N_2, H_2

The bond between nitrogen atoms in single N_2 molecule  = N≡N (triple bond)

Then in two N_2  molecules = 2 N≡N (triple bonds)

The bond between hydrogen atoms in single H_2 molecule = H-H (single bond)

Then in three H_2  molecules = 3  H-H (single bonds)

Product in the reaction =NH_3

The bonds between nitrogen and hydrogen atoms in single NH_3 molecule = 3 N-H (single bond)

Then in two NH_3  molecules = 6  N-H (single bonds)

So, there are two N≡N bonds and three H–H bonds are in reactants.

Learn more about reactants and products here:

brainly.com/question/21517037?referrer=searchResults

brainly.com/question/20602904?referrer=searchResults

3 0
2 years ago
What is the change in gravitational potential energy of an apple with a mass of 0.25 kg if it falls 0.7 m from a table. Estimate
Drupady [299]

Answer:

1.71675 J

Explanation:

Please mark Brainliest?

Hope this helps!

8 0
3 years ago
You are balancing an ionic compound. Let's call it: AB.
rewona [7]

Answer:- A_3B_2

Explanations:- It is given that the charge for A is +2 and the charge for B is -3. The over all compound is neutral means the over all charge is zero. For making the over all charge zero, we need 3 positive ions and 2 negative ions. This makes a +6 charge for A and -6 charge for B and the over all charge is zero.

Also, if we think about the criss cross then charge of A becomes the subscript of B and the charge of B becomes the subscript of A.

So, the formula of the ionic compound is A_3B_2 . In this compound the ratio of A to B is 3:2.

The balanced equation could be shown as:

3A+2B\rightarrow A_3B_2



8 0
3 years ago
How many cups of beer are in a keg?
Alinara [238K]
The answer is roughly 165 cups of beer.
5 0
3 years ago
What is the name for potassium oxide's structure? Give two properties of potassium oxide.
Anna71 [15]

Answer:

- The name for the potassium oxide's structure is ionic.

Properties:

- High melting point.

- Soluble in water.

Explanation:

- The ionic structure it is formed by a cation (atom with positive charge) and an anion (atom with negative charge). In this case, potassium is the cation and the oxigen is the anion.

- Since potassium oxide is an ionic compound, it has a high melting point, because of the strong bonds. Also, it is soluble in polar solvents, like water, because its ions generate polarity in the molecule.

8 0
1 year ago
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