C3H8
There is only one isomer of propane:
H H H
HC-C-CH
H.H H
It’s easier to see I’m a bond line formula; however, You can see that trying to take a methyl group off and move it results in the same structure.
To answer the question, we will use Charles law, that states that volume of any gas that is related directly with the temperature if the gas is ideal. It means that gas should be placed in an environment where pressure is constant but temperature can vary, that will ultimately change the volume.
Lets use the formula of Charles law:
V1/T1 = V2/T2
Putting the values of V1 as 0.67L , T1 as 350 K and V2 as 45/100 x 0.67
0.67 / 350 = 45/100 x 0.67 /T2
0.67 / 350 = (0.45)(0.67) / T2
T2 = (350) (0.45)
T2 = 157.5K
It means that gas needs a temperature of 157.5 K to decrease its volume by an amount of 45 percent.
Hope it helps!
There are 12 lone pairs of electrons that are represented in the Lewis structure of a phosphate ion.
A scalar quantity is a quantity that has magnitude only but no direction, while a vector quantity is a quantity that has both magnitude and direction:
Let's go through the choices:
Displacement: you can move from one point to another towards east, west, north,....etc. This means that displacement has both magnitude and direction. (vector)
Time: time has no direction whatsoever. (scalar)
Velocity: velocity is mass*acceleration. The acceleration can be towards any direction. Your velocity can be towards any direction. Since acceleration is vector, therefore, velocity is also a vector quantity.
Force: a force can push a body right, left,...etc. This means that the force has a direction as well as a magnitude. (vector).
Based on the above, the scalar quantity is:
(B) Time