Answer: The answer would be 4. Carbon dioxide : deforestation
Explanation:
Answer:
+5
Explanation:
Let's consider the following balanced equation.
Mn(NO₃)₂ + 2 HCl --> MnCl₂ + 2 HNO₃
We can determine the oxidation number of N in (NO₃)₂²⁻ taking into account that the sum of the oxidation numbers of the elements present in a chemical species is equal to this overall charge. For this compound we know:
- The oxidation number of O is -2.
- The overall charge is 2-.
- We have 2 atoms of N and 2× 3 = 6 atoms of O.
2 N + 6 O = 2-
2 N + 6 (-2) = 2-
2 N = +10
N = +5
Bohr's theory states that the motion of the electron (particle) around the nucleus is very much similar to motion of the planets around the sun in the solar system. Both in the mathematical and physical sense.
The Bohr's Atomic theory only explains the motion of the electrons in discrete atomic orbitals that are predicted by the Bohr's equation.
It strictly implies that the electron only exists in these discreet orbitals and fails to explain anything about the nature of the electron in between the discrete orbitals.
The modern atomic theory does not share this limitation as it does not impose the electron to only occupy the discrete orbitals and neither does it impose particle nature upon the electron.
In the modern theory does not focus on describing the motion of the electron around the orbital but rather the probability of finding an electron around the nucleus. The modern atomic orbitals or electron clouds are the regions in which the probability of finding the electron is the highest when the wave function collapses. The Schrödinger's wave equation explains the evolution of the wave function in time. Hence enabling us to predict the future possible locations of the electron but never the exact location as that is impossible due to the Heisenberg's Uncertainty principle.
Learn more about Bohr's atomic orbitals by clicking here :
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Answer:
5.89 g × 10⁶ μg
Explanation:
Step 1: Convert 5.00 scruples to grains
We will use the conversion factor 1 scruple = 20 grains.
5.00 scruple × 20 grain/1 scruple = 100 grain
Step 2: Convert 100 grains to ounces
We will use the conversion factor 1 oz = 480 grains.
100 grain × 1 oz/480 grain = 0.208 oz
Step 3: Convert 0.208 oz to grams
We will use the conversion factor 1 oz = 28.34 g.
0.208 oz × 28.34 g/1 oz = 5.89 g
Step 4: Convert 5.89 g to micrograms
We will use the conversion factor 1 g = 10⁶ μg.
5.89 g × 10⁶ μg/1 g = 5.89 g × 10⁶ μg
Answer:
A. 0525.
B. 0.3483 atm.
C. 0.3890.
Explanation:
A.
Molar mass of Benzene =
(12*6) + (1*6)
= 78 g/mol.
Number of moles of Benzene = mass/molar mass
= 50/78
= 0.641 moles.
Molar mass of n-hexane =
(12*6) + (1*14)
= 86 g/mol.
Number of moles of n-hexane = mass/molar mass
= 50/86
= 0.581 moles.
Total moles of the solution = number of moles of Benzene + number of moles of n-hexane
= 0.641 + 0.581
= 1.222 moles
Mole fraction is the number of moles of a particular substance in a solution divided by the total number of moles of substances in the solution.
Mole fraction of Benzene = 0.641/1.222
= 0.525.
B.
Vapour Pressure of a solution is the amount of pressure that the vapour exert on the liquid solvent when they are in equilibrium and at a certain temperature.
Uaing Raouit's law and Dalton's law,
Raoult's law states that the the partial pressure of a solution is directly proportional to the mole fraction of the solute component.
Dalton's law states that the total pressure of a solution is the sum of its individual partial pressure.
Uaing Dalton's law,
Psol = Pbenzene + Pn-hexane
= 0.1355 + 0.2128
= 0.3483 atm
C.
Using Raoult's equation, Mole fraction of Benzene = P°benzene/Psol
= 0.1355/0.3483
= 0.3890
