Answer : The mass of 7.0 m chain is, 15.12 kg
Explanation :
As we are given that,
The weight of the chain per unit length = 2.16 kg/m
Now we have to determine the mass of chain for 7.0 m length.
As, the mass of 1 m length of chain = 2.16 kg
So, the mass of 7.0 m length of chain = 
= 15.12 kg
Therefore, the mass of 7.0 m chain is, 15.12 kg
Answer:
The value of the missing equilibrium constant ( of the first equation) is 1.72
Explanation:
First equation: 2A + B ↔ A2B Kc = TO BE DETERMINED
⇒ The equilibrium expression for this equation is written as: [A2B]/[A]²[B]
Second equation: A2B + B ↔ A2B2 Kc= 16.4
⇒ The equilibrium expression is written as: [A2B2]/[A2B][B]
Third equation: 2A + 2B ↔ A2B2 Kc = 28.2
⇒ The equilibrium expression is written as: [A2B2]/ [A]²[B]²
If we add the first to the second equation
2A + B + B ↔ A2B2 the equilibrium constant Kc will be X(16.4)
But the sum of these 2 equations, is the same as the third equation ( 2A + 2B ↔ A2B2) with Kc = 28.2
So this means: 28.2 = X(16.4)
or X = 28.2/16.4
X = 1.72
with X = Kc of the first equation
The value of the missing equilibrium constant ( of the first equation) is 1.72
The particles in a solid are tightly packed and locked in place. ... The particles in a liquid are close together (touching) but they are able to move/slide/flow past each other. The particles in a gas are fast moving and are able to spread apart from each other.
Answer:
0.00018M
Explanation:
Mass of the aspirin tablet =0.4g.
% by mass of ASA=68.2
mass of in the tablet=68.2/100×0.4g
=0.2748g
mass conc of ASA=mass of ASA/Volume of diluent(250ml)
=0.2748/0.25
=1.0992g/dm3
molar conc=mass conc/molar mass
=1.0992/180.16
=0.006M
Conc of the stock solution C1=0.006M
Initial volume for making the diluted solution(V1)=3ml
final volume of the diluted solution=100ml
from dilution principle
no of mole=conc × volume
initial conc(C1)×initial volume(V1)=final conc(C2)×final volume(V2)
C2=0.006M×3ml/100ml
=0.00018M
