Help only if you know the answer

Answer:

When you look only at the “before” and “after” of a change, you are considering it as static change. In this perspective, you look at change as a one-dimensional shift. A situation or object was one way, and now it is different because some outside force acted on it to make it change.

Explanation:

Its the def

Answer:

Particles?  Calcium hydroxide does not exist as discrete molecules, but as a network solid.  The only way you would have separate particles, is if the calcium hydroxide was dissolved in a boatload of water.  Ca(OH)2 is not all that soluble in water.  Nonetheless, assume a lot of water, enough to dissolve 56.9 moles.

Ca(OH)2 --> Ca2+ + 2OH-

56.9 moles Ca(OH)3 x (3 moles ions / 1 mol Ca(OH)2) = 170.7 mol ions

==================

Percent composition of CuNO3......molar mass = 125.5 g/mol

Cu.... 1 x 63.5 / 125.5 x 100 = 50.6% Cu

N ......1 x 14.0 / 125.5 x 100 = 11.2% N

O .....3 x 16.0 / 125.5 x 100 = 38.2% O

(hope this helps can i plz have brainlist :D hehe)

Explanation:

Answer:

mixtyre

Explanation:

Answer:

Sorry i might be wrong but I believe the answer is evaporation

Explanation:

Its says the diagram So is there a diagram u can show us?

Answer:

physical change, because a new substance is formed

Explanation:

Answer:

12%

Explanation:

The percentage of Guanine and Cytosine in DNA are equal to each other, as one molecule of guanine bonds with one molecule of cytosine.

Conversely, the percentage of adenine and thymine in DNA are equal to each other.

Answer:

Chlorine, astatine, bromine, and fluorine.

Answer:

Fluorine, Chlorine, Bromine, and Astatine

Explanation:

they are all in group 17 meaning they have similer chemical properties.

Answer:

Chemistry can help us to understand, monitor, protect and improve the environment around us.

Explanation:

I hope this helps u! :D

Explanation:

The right answer is Look .........

Certain females may only love a male for his looks and money.

Certain females may love a male for his personality.

Certain females may love a male depending on his height.

That's all I know.

Answer:

The concentration of nitrogen gas and hydrogen gas that reacted initially are 10.0 M and 11.0 M respectively.

Note: The question is incomplete. The complete question is as follows:

An initial mixture of nitrogen gas and hydrogen gas is reacted in a rigid container at a certain temperature as follows:

3H2(g)+N2(g)⇌2NH3(g)

At equilibrium, the concentrations are

[H2] = 5.0 M, [N2] = 8.0 M, and [NH3] = 4.0 M.

What were the concentrations of nitrogen gas and hydrogen gas that were reacted initially?

Explanation:

Given the following data:

Concentration of H2 at equilibrium = 5.0 M

Concentration of N2 at equilibrium = 8.0 M

Concentration of NH3 at equilibrium = 4.0 M

The given equilibrium reaction is,

Initial                    a             b            c

Change                -3x          -x         +2x

Equilibrium         (a-3x)       (b-x)     +2x

The value of x is calculated from the equilibrium of NH3

Concentration of NH3 at equilibrium = 4.0 M  = 2x

x = 2.0 M

Substituting the value of x above

Initial Concentration of H2:

a - 3 × 2.0 M = 5.0 M

a = 6.0 M + 5 = 11.0 M

Initial Concentration of N2:

b - 2.0 M = 8 M

b = 8.0 M + 2.0 M

b = 10.0 M

Therefore, the concentration of nitrogen gas and hydrogen gas that reacted initially are 10.0 M and 11.0 M respectively.

Answer:

The answer is D

Explanation:

Mass is the amount of matter in an object and gram is the common unit of measurement of mass

Answer:

30

Explanation:

Answer:

The first one, The third one.

700-25, 600+75!

Explanation:

Answer: The last one I think

Explanation:

Answer:

10623.0

Explanation:

Because 3541 is speed per hour

You need to find 3 hours

so multiply 3541 x 3

3541 x 3 = 10623

Answer:

gvapor or gas to liquid

Explanation:

water which collects as droplets on cold surface when humid air is in contact with it

Answer:

The answer should be B. G-T-A-G-C-T

A pairs with T and G pairs with C.

Answer:

It's B, GTAGCT.

Explanation:

Answer:

Hope it helps....⋋✿ ⁰ o ⁰ ✿⋌(・o・)

Answer:

motion

Explanation:

Answer:

Indigo wavelength is between  

420

and  

450

nm.

Blue wavelength is between  

450

and  

495

nm.

So blue has a greater  

λ

than indigo.

Explanation:

Answer:

Indigo has greater frequency.

Have a great day!

Answer:

It means Sulfurous Acid

Explanation:

Answer:

22.5%

Explanation

% composition = Molar mass of S

------------------------ x 100

Molar mass of Na2SO4

= 32.065

------------ x 100

142

=0.225 x 100

= 22.5%

Answer:

chupapi muano goagaag djdu

Answer: I think it's  A

Explanation:

Answer:

  11. 1, 4.5

  12. right; 4.5 > 1

  13. 10, 3

  14. left; 10 > 3

Explanation:

All you're being asked to do is count the squares in the pictures.

11. The number of squares for the left wave from bottom to top is 2, so the amplitude is 1/2 that, 2/2 = 1. For the right wave it is 9 squares from bottom to top, so the amplitude is 9/2 = 4.5.

  left amplitude: 1, right amplitude: 4.5

__

12. The right wave has greater amplitude. Evidence: 4.5 > 1. It also takes up more vertical space in the picture.

__

13. It is difficult to determine the wavelength of the left wave, because two full peaks are not shown. If we try to match corresponding points, they appear to be about 10 squares apart.

The right wave has 2 peaks in 6 squares, so about 3 squares between peaks.

  left: wavelength 10, right: wavelength 3

__

14. The left wave has greater wavelength. Evidence: 10 > 3.

Answer:

11. 1, 4.5

12. right; 4.5 > 1

13. 10, 3

14. left; 10 > 3

Explanation:

Answer:

4 moles...................

Answer:

it could destroy the nucleus

Explanation:

due too much power going into it

Answer:

1.33 x 10^-3 mol H2

Explanation:

? mol H2 = 8.00 x 1020^20 molecules H2 x  1 mol H2/6.02 ! 1023 molecules H2 = 1.33 x 10^-3 mol H2

Hope that helps!

8.00 x 10²⁰ molecules of H₂ present in 1.33 x 10⁻³ mole of H₂.

Mole is used to define the amount of quantity of any substance and 1 mole equals to the 6.023 × 10²³ elementary entities or atoms in it.

According to the question:

1 mole of H₂ = 6.023 × 10²³ molecules of H₂

or 1 molecules of H₂ = 1 mole of H₂ / 6.023 × 10²³ molecules of H₂

To convert 8.00 x 10²⁰ molecules into mole we calculate as follow:

x mole of H₂ = (8.00 x 10²⁰ molecules x  1 mole of H₂) / 6.023 × 10²³ molecules

x mole = 1.33 x 10⁻³ mole

Hence, 1.33 x 10⁻³ mole of H₂ consist 8.00 x 10²⁰ molecules.

To know more about moles, visit the below link:

https://brainly.com/question/15356425

Answer:

Polar molecules have a non-zero net dipole moment. Both CO2 and H2O have two polar bonds. However the dipoles in the linear CO2 molecule cancel each other out, meaning that the CO2 molecule is non-polar. The polar bonds in the bent H2O molecule result in a net dipole moment, so H2O is polar.

Explanation:

Answer:

c. 0.0015 g of coopet, cu

Explanation:

Answer:

When there is heat at the bottom of this air or water, the air or water molecules in contact with the heat start to move, and the molecules spread apart. The heated air or water becomes less dense. It rises up until it gets to air or water with the same density as it has, and when it gets there, it pushes the air or water that was there out of the way. At the same time, new air or water fills the space that was vacated when the heated molecules rose up. The air or water that gets pushed out of the way falls down. This sets up a circular motion. Air or water is heated at the bottom, travels to the top, cools, gets denser, falls, is heated again and the whole cycle starts again. Convection does not occur in space because there is no gravity. Ovens work by convection. The heating coils at the bottom of the oven heat the air which climbs to the top, cools slightly, and falls down again.

Explanation: