An atom contains three protons, two neutrons, and one electron. What is the charge of the nucleus?
1 answer:
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First step in answering the question is to establish a balanced chemical reaction equation. More specifically, a combustion chemical equation.
CH4 + 2O2 ---> CO2 + 2H20
Then using dimension analysis:
CH4 + 2O2 ---> CO2 + 2H20
Then using dimension analysis:
Answer:
The separation between layers of atoms in the crystal is 164.52 pm.
Explanation:
Formula used
(Bragg's law)
Where :
n = an order of reflection (integer)
= wavelength of the beam incident X-ray
d = spacing between the layer
θ = incident angle ( angle between ray and scatter plane)
We have :
λ = 157 pm
θ = 28.5°
n = 1
d = ?
(Bragg's law)
The separation between layers of atoms in the crystal is 164.52 pm.
Answer : The correct option is, (C) 1.7
Explanation :
First we have to calculate the moles of and
.
The balanced chemical reaction will be:
0.01 mole of dissociate to give 0.01 mole of
ion and 0.02 mole of
ion
and
0.03 mole of dissociate to give 0.03 mole of
ion and 0.03 mole of
ion
That means,
0.02 moles of ion neutralize by 0.02 moles of
ion.
The excess moles of ion = 0.03 - 0.02 = 0.01 mole
Total volume of solution = 100 + 300 = 400 ml = 0.4 L
Now we have to calculate the concentration of ion.
Now we have to calculate the pH of the solution.
Therefore, the pH of the solution is, 1.7