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:
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Explanation:
We know that tangential acceleration is related with radius and angular acceleration according the following equation:
at = r * aa
where at is tangential acceleration (in m/s2), r is radius (in m) aa is angular acceleration (in rad/s2)
So the radius is r = d/2 = 1.2/2 = 0.6 m
Then at = 0.6 * 5 = 3 m/s2
Tangential acceleration of a point on the flywheel rim is 3 m/s2
Mountains are one of the most affected by weathering.
Answer:
M=28.88 gm/mol
Explanation:
Given that
T= 95 K
P= 1.6 atm
V= 4.87 L
m = 28.6 g
R=0.08206L atm .mol .K
We know that gas equation for ideal gas
P V = n R T
P=Pressure , V=Volume ,n=Moles,T= Temperature ,R=gas constant
Now by putting the values
P V = n R T
1.6 x 4.87 = n x 0.08206 x 95
n=0.99 moles
We know that number of moles given as
M=Molar mass
M=28.88 gm/mol