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Alja [10]
4 years ago
11

Why ice floats on water is a physical change​

Chemistry
1 answer:
creativ13 [48]4 years ago
5 0

Answer:

Ice floats on water because it is less dense than water. When water freezes into its solid form, its molecules are able to form more stable hydrogen bonds locking them into positions. Because the molecules are not moving, they're not able to form as many hydrogen bonds with other water molecules. Ice is a unique substance because it is solid-state — ice — is less dense than its liquid state. Because of this property, ice floats in water. Physical properties are characteristics of a substance. They do not change. Ice floats on water because it is less dense than water. When water freezes into its solid form, its molecules are able to form more stable hydrogen bonds locking them into positions.

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Chemistry- "write the products expected from each acid-base reaction shown below........
Dahasolnce [82]
1.) NaOH + HCl  →  NaCl  +  H₂O
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2.) Ca(OH)</span>₂ <span> +  H</span>₂<span>SO4  </span>→<span>  CaSO</span>₄ +  2H₂O
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3.) 2HCl +Ba (OH)2  </span>→ <span> BaCl</span>₂  +  2H₂O
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4.) HNO3 + LiOH   </span>→  <span> LiNO</span>₃ <span> +  H</span>₂O
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5.) H</span>₂CO₃ + NaOH  →  Na₂CO₃  +  H₂O
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6.) KOH  +  HC</span>₂H₃O₂  →  KC₂H₃O₂  <span>+  H</span>₂O
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7.) Ba(OH)2 + HNO2  </span>→<span> Ba(NO</span>₂)₂<span>  +  H</span>₂O
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8.) H</span>₂<span>SO</span>₃<span> + 2NaOH  </span>→<span>  Na</span>₂SO₃  <span>+  2H</span>₂O
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9.) H</span>₃<span>PO</span>₄<span> + 3KOH  </span>→<span>   K</span>₃PO₄  <span>+   3H</span>₂O 
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10.) 2HBr + Ca(OH)2  </span>→<span>  CaBr</span>₂  +  2H₂O


The reason why water is so recurrent is because of the general form that says:   ACID  +  BASE  →  SALT  +  WATER

I took the liberty of balancing the equations.
8 0
4 years ago
The electron configuration can be also be represented by writing the symbol for the occupied subshell and adding a superscript t
hichkok12 [17]

Answer: The electron configuration of carbon atom is written as 1s²,2s², 2p².

Explanation:

The electronic configuration of an atom is defined as the arrangement of electrons into the shells or orbit of an atom. The constituents of an atom are proton, neutron and electron. the nucleus of an atom, where most of its mass are concentrated, consists of neutrons and protons fused together. Electrons occupy the shells surrounding the nucleus. The shells are lettered K, L, M, N and so on. Numerically, K shell is numbered 1, L is 2 and so on. These numbers also correspond with the increase in the energy level. All the electrons in K shell for instance belong to the first energy level and they have equal energy.

There is a limit to the number of electrons that can be found in a shell. This can be obtained by a formula 2n² where "n" is the energy level number of the shell.

K: 2n² = 2 × 1² = 2

L: 2n² = 2× 2² = 8

These shells are further subdivided into subshells. There are 4 subshells, s, p, d, and f. Each subshell can hold a different number of electrons.

This electron configuration of carbon can be written as 1s² 2s² 2p² where 1s, 2s, and 2p are the occupied subshells, and the superscript "2" is the number of electrons in each of these subshells.

4 0
3 years ago
There are three known forms of hydrogen. These forms are called (ions/copies/isotopes) of each other. Each of these forms will h
liraira [26]
Answers by order. 
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7 0
3 years ago
Read 2 more answers
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AysviL [449]

Answer:

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4 0
3 years ago
Read 2 more answers
If the hydroxide ion concentration of a solution is 3.26 x 10-6 M, is it an acidic or a basic solution?
sladkih [1.3K]

Answer: It is a basic solution with pH =8.51

Explanation:

We were given that hydroxide ion concentration [OH-] as 3.26 x 10-6 M

But We know thar

[OH-] [H+] = 1 × 10^-14

To get the Hydrogen ion [H+] concentration, we have that

[H+] = 1 × 10^-14 M/[OH-]

= 1 × 10^-14 M/3.26 x 10-6 M

    =  3.067 x 10^-9 M

But, pH = - log [H+]

Therefore,

pH = - log (3.067 x 10^-9)

pH=8.51

when  pH > 7, The solution is basic, therefore a solution with pH =8.51 is basic.

8 0
3 years ago
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