Explanation:
The given data will be as follows.
7 kg of dimethyl terephthalate + 5 kg of Ethylene glycol = 12 kg of product
Formula for weight average number is as follows.
=
Molecular weight of DMT = 198.21 g/mol
Molecular weight of ET = 62.07 g/mol
Hence, calculate the weight average number as follows.
=
= (115.62 + 25.862) g/mol
= 141.482 g/mol
Since, efficiency is given as 50% = 0.5
0.5 =
=
= 70.741 g/mol
As, =
=
= 24 g
Thus, we can conclude that the amount of given polymer is 24 g.
Answer: The partial pressure of oxygen in the tank is 82.95 kPa.
Explanation:
According to Raoult's law, the partial pressure of a component at a given temperature is equal to the mole fraction of that component multiplied by the total pressure.
where,
= partial pressure of oxygen
= mole fraction of oxygen
= Total pressure
,
where = moles of oxygen =
= moles of Helium =
Thus the partial pressure of oxygen in the tank is 82.95 kPa.
The formula for calculating the density (p)=m/v
m:mass
v:volume
<u>Explanation:</u>
In the question above,given that
<u>mass of water (m)</u> =100 g
<u>Volume of water in a beaker (v)</u>=100 mL
<u>The Density of the water(p</u>)=m/v=100 g/100 mL= 1 g/mL
The answer is (B) 1 g/mL