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hammer [34]
3 years ago
9

. The shell around the nucleus can be numbered from near to the nucleus as 1, 2, 3, 4,

Chemistry
1 answer:
taurus [48]3 years ago
3 0

Answer:

He numbered these orbits due to their location.

Explanation:

Scientist Neil Bohr in his atomic model describes that electrons are moving with high velocity in circular paths around the nucleus is called shells or orbits. As long as electrons are in their particular orbit their energy is constant. He named those orbits as K- shell, L- shell and M- shell etc. When the electron absorb energy, it is able to jump to the next shell and comes back to its original shell when it loses energy. He also give numbers i.e. 1,2,3,4 to the shells due to their nearness to the nucleus. Shell 1 is near to the nucleus whereas shell 4 is farther from the nucleus.

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If a biochemist discovers a new molecule, which of the following pieces of data would allow her to draw the conclusion that the
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5 0
3 years ago
To prevent rust, nails are coated with ________. To prevent rust, nails are coated with ________. salt calcium lithium sodium zi
Arturiano [62]

Answer:

the answer to this question is zinc

7 0
3 years ago
Calculate the molecular mass of the element
Elanso [62]

Answer:

Cu3 (PO4)2

3×64 + 2×(31+ 4×16)

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4 0
2 years ago
An excess of mg(s) is added to 100.ml of 0.400 m hcl. at 0c and 1 atm pressure, what volume of h 2 (g) can be obtained?
ra1l [238]
The balanced equation for the reaction between Mg and HCl is as follows
Mg + 2HCl --> MgCl₂ + H₂
stoichiometry of HCl to H₂ is 2:1

number of HCl moles reacted - 0.400 mol/L x 0.100 L = 0.04 mol of HCl
since Mg is in excess HCl is the limiting reactant 
number of H₂ moles formed - 0.04/2 = 0.02 mol of H₂

we can use ideal gas law equation to find the volume of H₂
PV = nRT 
where 
P - pressure - 1 atm x 101 325 Pa/atm = 101 325 Pa
V - volume
n - number of moles - 0.02 mol
R - universal gas constant - 8.314 Jmol⁻¹K⁻¹
T - temperature in Kelvin - 0 °C + 273 = 273 K
substituting these values in the equation 

101 325 Pa x V = 0.02 mol x 8.314 Jmol⁻¹K⁻¹ x 273 K
V = 448 x 10⁻⁶ m³
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c. 448 mL 
5 0
3 years ago
You are trying to boil water while camping in the Colorado Rockies. The surrounding barometric pressure is 0.9 bar, and the wate
irga5000 [103]

Answer:

Perfectly Specified

Explanation:

Pressure, P = 0.9 atm

Boiling point = T

Number of components C = 1

Number of phases P = 2

Using  Gibbs phase rule as:

F = C - P + 2

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At Pressure = 0.9 atm, boiling point is T which means that the temperature is also fixed which is equal to 96.7 °C . The data taken from steam table.

In given problem, the pressure is fixed so temperature is also fixed.

The system is perfectly specified.

8 0
4 years ago
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