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salantis [7]
3 years ago
12

Rutherford proposed that atoms have positive nuclei. Which statement correctly describes the nucleus of an atom?

Chemistry
2 answers:
DIA [1.3K]3 years ago
8 0
I'm not 100% sure but I'm leaning towards D. :)
Over [174]3 years ago
5 0

Answer:

D.)Most of the mass of an atom is located in the nucleus.

Explanation:

Rutherford conducted his famous gold foil experiment which refined our understanding of the structure of an atom. Through the experiment he observed that when positively charged alpha particles were bombarded against a thin gold foil, majority of them passed through the foil undisturbed whereas a small percentage retraced their path.

There were two main conclusions:

-Since most alpha particles simply passed through undeviated this suggested that majority of the space inside the atom is empty

- Also, since some of them completely bounced back this suggested that there is a positively charged core in which the mass of the nucleus is concentrated.

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Which system is not directly connected to itself
Nataliya [291]

Answer:

B) Digestive

Explanation:

The system is dependent in the digestive system because it sends the nutrients to the bones and this helps the bone growth and the repair. It can not be A. since the skeleton system is connected with the muscular system physically, this is to protect muscles and allow the skeletal muscles to make the bones move, so this system is connected with itself with the help of the muscular system! The endocrine is somewhat connected with the nervous system, they are both essential to the communication and response system. This eliminates A and C and leaves you with B!

5 0
2 years ago
The temperature of a substance increases when the ____________________ energy of the substance increases.
kykrilka [37]
Molecular

Hope it helps
7 0
3 years ago
Read 2 more answers
Identify the two main materials that can be found in the inner and outer core layers of the earth.
Mrrafil [7]
A. Iron D. Nickel hope this helps you!
6 0
3 years ago
Calculate the vapor pressure at 35ºC of a solution made by dissolving 20.2 g of sucrose (C12H22O11)in 60.5 g of water. The vapor
sukhopar [10]

Answer:

P' = 41.4 mmHg → Vapor pressure of solution

Explanation:

ΔP = P° . Xm

ΔP = Vapor pressure of pure solvent (P°) - Vapor pressure of solution (P')

Xm = Mole fraction for solute (Moles of solvent /Total moles)

Firstly we determine the mole fraction of solute.

Moles of solute → Mass . 1 mol / molar mass

20.2 g . 1 mol / 342 g = 0.0590 mol

Moles of solvent → Mass . 1mol / molar mass

60.5 g . 1 mol/ 18 g = 3.36 mol

Total moles = 3.36 mol + 0.0590 mol = 3.419 moles

Xm = 0.0590 mol / 3.419 moles → 0.0172

Let's replace the data in the formula

42.2 mmHg - P' = 42.2 mmHg . 0.0172

P' = - (42.2 mmHg . 0.0172 - 42.2 mmHg)

P' = 41.4 mmHg

5 0
3 years ago
When a piece of solid phosphorus is added to a flask containing chlorine gas, heat is evolved?
Sav [38]
White phosphorus burns spontaneously in chlorine to produce a mixture of two chlorides, phosphorus (ii) chloride and phosphorus(v) chloride and heat is evolved. Phosphorus (iii) chloride is a colorless fuming liquid: 
P4 + 6Cl2 = 4PCl3
Phosphorus (v) chloride is an off-white solid
P4 +10Cl2 = 4PCl5

7 0
3 years ago
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