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yarga [219]
3 years ago
10

Jerome is learning how the model of the atom has changed over time as new evidence was gathered. He has images of four models of

the atom, but they are not in the correct order. An image at the left labeled W with overlapping red and blue balls in the center with a circular fuzzy green cloud outside them. An image at center-left labeled X with a purple ball in the center surrounded by overlapping concentric black ovals, each with a small green ball on each of the 6 ovals. An image at center right labeled Y with a large black cross in a purple circle with a black line around the purple, with 10 small green balls dispersed within the purple circle. An image at right labeled Z with a purple center outlined in black with two concentric black circles around the center, the inner circle having 2 small green balls on it and the outer circle having 8 small green balls on it. In what order should Jerome put these models to show the development from the earliest model of the atom to the most recent one? A. Y, X, Z, W B. Y, Z, W, X C. W, Z, X, Y D. W, Y, Z, X
Chemistry
2 answers:
stepladder [879]3 years ago
8 0

Answer:

the answer is A. Y, X, Z, W

Explanation:

I took the test

Rudik [331]3 years ago
5 0

Answer:

Y X Z W

Explanation:

I took test.

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In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. I
Vsevolod [243]

Answer : The final concentration of the seawater is, 2.909 mole/L

Explanation :

Formula used for osmotic pressure :

\pi=CRT

where,

\pi = osmotic pressure  = 70.0 bar = 70 atm

R = solution constant  = 0.0821 Latm/moleK

T= temperature of solution = 20^oC=273+20=293K

C = final concentration of seawater = ?

Now put all the given values in the above formula, we get the concentration of seawater.

70atm=C\times 0.0821Latm/moleK\times 293K

C=2.909mole/L

Therefore, the final concentration of the seawater is, 2.909 mole/L

4 0
4 years ago
Please help this is due today which ones are reactive and which arent?​
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Answer:

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4 0
3 years ago
A 20 g piece of metal with specific heat 0.4 J/g.°C absorbs 3.9 kilojoules of heat,
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Answer:

given that

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....specific heat capacity(c) is 0.4J/g°C

....ΔT=??

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ΔT= Q/mc

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8 0
3 years ago
If you need to reverse the following reaction in order for it to be an intermediate reaction in a Hess's law problem, what would
Olin [163]
When reversing a given reaction, we simply change the sign of the standard enthalpy change value. Therefore, the reaction will become:
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4 0
3 years ago
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According to the following reaction, how many grams of hydrogen peroxide (H2O2) are needed to form 32.0 grams of oxygen gas?
Nesterboy [21]

Answer:

The answer to your question is 34 g of H₂O₂    

Explanation:

Data

mass of H₂O₂ = ?

mass of O₂ = 32 g

Process

1.- Write the balanced chemical reaction

                   H₂O₂  ⇒   H₂  +  O₂

2.- Calculate the molar mass of H₂O₂ and O₂

Molar mass H₂O₂ = (1 x 2) + (16 x 2) = 34 g

Molar mass of O₂ = 2 x 16 = 32 g

3.- Use proportions to calculate the mass of O₂

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                     x                   -------------- 32g of O₂

                          x = (32 x 34) / 32

                          x = 34 g of H₂O₂                                

5 0
3 years ago
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