“What is the group number for the elements that have a stable number of electrons in their outer energy level?”

The molecules of a substance must have what characteristics in order to be flexible

Goryan [66]

Answer:
The molecules of a substance which must have the ability to move past one another are said to be flexible.

Explanation:
Those substances are said to be flexible which can be bent without breaking. There are many substances which are hard in nature but still can be bent. The hardness of such materials is due to strong interactions between the molecules and the flexibility comes due to their amorphous backbone. Therefore, greater the crystalline level of macromolecules lesser is the flexibility and greater the amorphous character greater is the flexibility and vice versa. Also, the flexibility of polymers is increased by adding plastisizers in it. Plastisizers make the hard polymers flexible by breaking the crosslinkers and enabling the macromolecules to move past one another.

6 0

3 years ago

I NEED HELP WITH #3 pleaseeee

Anit [1.1K]

Answer:

energy level

sub energy level

electrons in the orbital

Explanation:

3 0

3 years ago

CI2+NaOH⇒NaCI+NaOCI+H20 is there a way to balance this?

Snowcat [4.5K]

I really don’t think so…

4 0

3 years ago

I really need help with chemical equations and balanced chemical equations ......

SashulF [63]

What do u need help with? I’m sure I can help you
A chemical equation has 2 sides: the reactives side and the products side
For a chemical equation to be balanced these two side must have the same number of atoms of each type, since in a chemical reaction mass must stay the same

Each symbol in either side will have a subscript. A subscript is the tiny number at the bottom of the symbol. If a symbol has no subscript then that indicate there’s only one atom of that type. However if it has, for example, a 4, then that indicates the are 4 atoms of that type. The thing is these subscripts cannot be changed...
Ex.
HgO —> Hg + O₂
Hg = 1 Hg = 1
O = 1 O = 2
This is an unbalanced equation because the is not oxigen on side that the other.
To balance it u must add a coefficient. This number goes before the whole group of symbols — You can not break apart a group to insert a coefficient in the middle. This number is multiplied by the subscript on each of the symbols in the group. You need to find the correct coefficient to multiply by the elements on both sides of the equation.
Note that this coefficient does no have to be the same on both sides
Answer:
2HgO —> 2Hg + O₂
Hg = 2 Hg = 2
O = 2 O = 2
Explanation:
To fix the oxigen we need to add a coefficient to the side that has less quantity. Because 2 x 1 = 2 (1 Is oxigen’s subscript) we place the 2 in front of the group HgO, But in doing so we damage the mercury, so we need to go to the other side to fix that so we place 2 in front of Hg.

If you need any more help, have some exercises I can further explain or have more doubt about this explanation then let me know and I will help you

Ps: I do recommend you first write the quantity of each atom for each side like I did. It makes it easier to visualize what you have to balance

3 0

3 years ago

The vapor pressure of water at 25°C is 3. 13×10^-2 atm, and the heat of vaporization of water at 25°C is 4. 39×10^4 J/mol. Calcu

Sergeu [11.5K]

The vapour pressure of water at 61°C is 1.28x10⁻³

Vapour pressure of a pure compound is the pressure characteristic at any given temperature of a vapour in equilibrium with its liquid or solid form

Kp=P H 2O =0.0313.

But

K p=K c(RT)

Δn=K c

(RT) because Δn=1.

Substitute values,

0.0313=K c (0.0821×298)

K c =1.28×10 −3 .

Learn more about Vapour pressure here-

brainly.com/question/25699778

#SPJ4

4 0

1 year ago