Answer:
13 530 482
Explanation:
H2 + I2 ------> 2HI
start (mol) 0.3785 0.3818 0
change (mol) -0.3534 -0.3534 +0.7067
equilibrium (mol) 0.0251 0.0284 0.7067
concentra (mol/L) 0.0068 0.0077 0.1926

When paper burns, some of the chemical compounds in the
paper combine with oxygen in the air and become different
chemical compounds. That's a chemical change.
When iron rusts, or copper or silver turns green, that's the result
of the metal at the surface combining with the oxygen in the air and
forming a new chemical compound. Those are chemical changes.
When water evaporates, H₂O in the liquid phase gains thermal
energy and changes to H₂O in the gaseous phase. No chemical
compounds are lost, gained, or changed to other compounds.
It's just a physical change.
Answer:
30 degrees Celsius
Explanation:
With unsaturated adiabatic lapse rate water vapour does not have to change state from gaseous to liquid.
Answer:
option (d) 7.1 kN
Explanation:
Given:
Mass of the car, m = 1600 kg
Acceleration of the car, a = 1.5 m/s²
Coefficient of kinetic friction = 0.3
let the tension be 'T'
Now,
ma = T - f .................(1)
where f is the frictional force
also,
f = 0.3 × mg
where g is the acceleration due to the gravity
thus,
f = 0.3 × 1600 × 9.81 =
therefore,
equation 1 becomes
1600 × 1.5 = T - 4708.8
or
T = 2400 + 4708.8
or
T = 7108.8 N
or
T = 7.108 kN
Hence,
The correct answer is option (d) 7.1 kN
To solve this problem we will apply the concepts related to energy conservation. Here we will understand that the potential energy accumulated on the object is equal to the work it has. Therefore the relationship that will allow us to calculate the height will be


Here,
m = mass
g = Acceleration due to gravity
h = Height
our values are,



Replacing,



Then the height is 32.83m.