Because proteins are basically building blocks which mean that they only fit to specific pieces.
Answer:
The limiting reactant between is NH₃.
Explanation:
The reaction of the Solvay process is:
CO₂(g) + NH₃(g) + H₂O(l) + NaCl(s) ⇄ NaHCO₃(s) + NH₄Cl(aq) (1)
Since the water and the sodium chloride are in excess we need to find the number of moles of CO₂ and NH₃ at STP (1 amt, 273 K).
![PV = nRT \rightarrow n = \frac{PV}{RT}](https://tex.z-dn.net/?f=%20PV%20%3D%20nRT%20%5Crightarrow%20n%20%3D%20%5Cfrac%7BPV%7D%7BRT%7D%20)
<em>Where</em>:
n: is the number of moles
P: is the pressure = 1 atm
V: is the volume
T: is the temperature = 273 K
R: is the gas constant = 0.082 L*atm(K*mol)
<u>For CO₂ we have</u>:
![n = \frac{PV}{RT} = \frac{1 atm*15.0 L}{0.082 L*atm/(K*mol)*273 K} = 0.67 moles](https://tex.z-dn.net/?f=%20n%20%3D%20%5Cfrac%7BPV%7D%7BRT%7D%20%3D%20%5Cfrac%7B1%20atm%2A15.0%20L%7D%7B0.082%20L%2Aatm%2F%28K%2Amol%29%2A273%20K%7D%20%3D%200.67%20moles%20)
<u>And for NH₃ we have</u>:
![n = \frac{PV}{RT} = \frac{1 atm*10.0 L}{0.082 L*atm/(K*mol)*273 K} = 0.45 moles](https://tex.z-dn.net/?f=%20n%20%3D%20%5Cfrac%7BPV%7D%7BRT%7D%20%3D%20%5Cfrac%7B1%20atm%2A10.0%20L%7D%7B0.082%20L%2Aatm%2F%28K%2Amol%29%2A273%20K%7D%20%3D%200.45%20moles%20)
From the equation (1) we have that 1 mol of CO₂ reacts with 1 mol of NH₃, so from that ratio we have:
![n_{CO_{2}} = \frac{\eta_{CO_{2}}}{\eta_{NH_{3}}}*n_{NH_{3}} = \frac{1}{1}*0.45 moles} = 0.45 moles](https://tex.z-dn.net/?f=%20n_%7BCO_%7B2%7D%7D%20%3D%20%5Cfrac%7B%5Ceta_%7BCO_%7B2%7D%7D%7D%7B%5Ceta_%7BNH_%7B3%7D%7D%7D%2An_%7BNH_%7B3%7D%7D%20%3D%20%5Cfrac%7B1%7D%7B1%7D%2A0.45%20moles%7D%20%3D%200.45%20moles%20)
From above we have that 1 mol of NH₃ reacts with 0.45 moles of CO₂, and we have 0.67 moles of CO₂, hence the limiting reactant is NH₃.
Therefore, the limiting reactant between CO₂ and NH₃ is NH₃.
I hope it helps you!
Answer:
121 g/mol
Explanation:
To find the molar mass, you first need to calculate the number of moles. For this, you need to use the Ideal Gas Law. The equation looks like this:
PV = nRT
In this equation,
-----> P = pressure (atm)
-----> V = volume (L)
-----> n = moles
-----> R = constant (0.0821 L*atm/mol*K)
-----> T = temperature (K)
Because density is comparing the mass per 1 liter, I am assuming that the system has a volume of 1 L. Before you can plug the given values into the equation, you first need to convert Celsius to Kelvin.
P = 1.00 atm R = 0.0821 L*atm/mol*K
V = 1.00 L T = 25.0. °C + 273.15 = 298.15 K
n = ? moles
PV = nRT
(1.00 atm)(1.00L) = n(0.0821 L*atm/mol*K)(298.15 K)
1.00 = n(0.0821 L*atm/mol*K)(298.15 K)
1.00 = (24.478115)n
0.0409 = n
Now, we need to find the molar mass using the number of moles per liter (calculated) and the density.
0.0409 moles ? grams 4.95 grams
---------------------- x ------------------ = ------------------
1 L 1 mole 1 L
? g/mol = 121 g/mol
**note: I am not 100% confident on this answer