Answer:
To check whether a chemical equation is balanced or not we usually look if elements on the product side are numerically equal to the reactant side or not.
A. Na + MgCl₂ → NaCl + Mg
<em> Reactant Product</em>
Na = 1 1
Mg = 1 1
Cl = 2 1
<u>Unb</u><u>alanced </u>
B. 2LiOH + H₂S → Li₂S + 2H₂O
<em>Reactant Product</em>
Li = 2 2
S = 1 1
O = 2 2
H = 4 4
<u>Balanced</u>
C. AgNO₃ + NaCl → NaNO₃ + AgCl
<em>Reactant Product</em>
Ag = 1 1
N = 1 1
Na = 1 1
Cl = 1 1
O = 3 3
<u>Balanced</u>
D. 3PBr₃ + 2Cl₂ → 3PCl₃ + 2Br₂
<em>Reactant Product</em>
P = 3 3
Br = 9 4
Cl = 4 9
<u>Unbalanced</u>
Therefore, equations B and C are balanced chemical equations.
Answer:
i am sorry i have no idea
Explanation:
Answer:
E = 12640.78 N/C
Explanation:
In order to calculate the electric field you can use the Gaussian theorem.
Thus, you have:
ФE: electric flux trough the Gaussian surface
Q: net charge inside the Gaussian surface
εo: dielectric permittivity of vacuum = 8.85*10^-12 C^2/Nm^2
If you take the Gaussian surface as a spherical surface, with radius r, the electric field is parallel to the surface anywhere. Then, you have:
r can be taken as the distance in which you want to calculate the electric field, that is, 0.795m
Next, you replace the values of the parameters in the last expression, by taking into account that the net charge inside the Gaussian surface is:
Finally, you obtain for E:
hence, the electric field at 0.795m from the center of the spherical shell is 12640.78 N/C
As per Dalton's model of atom he said that atom is indivisible and it can not be further divided into sub atomic parts
so atom is the most fundamental part of any matter
so here we can say that as per his theory of atom we have an atom is like the system of positive and negative charge not exist separately and we can't get it in free state
so here the correct way to show his model is by
<em>b) a solid sphere </em>