I think B or D because an eye obviously doesn't have a lense, mirror..maybe sorry for not giving u straight forward response
Answer:
you can solve the rest of the equation. I only reduced it to that much to show you how to derive it
Answer:
ΔG = -24.7kJ/mol
Explanation:
ΔG° of
Pb2+(aq) + 2Br-(aq) ⇄ PbBr2(s)
is:
ΔG° PbBr2 - (2*ΔG°Br- + ΔG°Pb2+)
-261.9kJ/mol - (2*-104.0kJ/mol + -24.4kJ/mol) =
-29.5kJ/mol
ΔG of the reaction is:
ΔG = ΔG° + RT lnQ
<em>Where R is gas constant (8.314x10⁻³kJ/molK)</em>
<em>T is absolute temperature (20°C + 273.15 = 293.15K)</em>
<em>Q is reaction quotient = 1 / [Pb²⁺][Br⁻]²</em>
<em />
Replacing:
ΔG = -29.5kJ/mol + 8.314x10⁻³kJ/molK*293.15K ln(1 / [Pb²⁺][Br⁻]²)
ΔG = -29.5kJ/mol + 8.314x10⁻³kJ/molK*293.15K ln(1 / [0.247M][0.758M]²)
<h3>ΔG = -24.7kJ/mol</h3>
<em />
Answer : The molarity of the ion is
Explanation : Given,
Density of sample = 1.00 g/mL
Concentration of = 42 mg/kg
First we have to calculate the volume of sample.
Let us assume that the mass of sample be 1 kg or 1000 g.
(1 L = 1000 mL)
Now we have to calculate the moles of
As we are given that,
Mass of in 1 kg of sample = 42 mg = 0.042 g
Molar mass of Ca = 40 g/mole
Now we have to calculate the molarity of the ion.
Therefore, the molarity of the ion is
This is a PV=nRT problem, commonly known as ideal gas. For this, we simply need to take what we know and plug it into the equation
Pressure x Volume = moles x ideal gas constant x tempature.
We know our pressure is 589mmHg so we can plug that in. The volume is unknown.
Then, we need to convert 8.45g of CO2 to moles. That is the grams to moles stoichiometry problem. I will not solve the problem for you, however I can set it up for you:
8.45gCO2 1 mole CO2
-------------- x --------------
1 44.01g CO2
At this point, we now have 589 x X= moles.
The ideal gas constant for mmHg should have been given to you, it is 62.4.
Then, we need to convert from celcius to kelvin. To do this, we simply add 273 to 10, since 273 is the standard unit for kelvin.
Now that we have all of our units, we can plug them into the PV=nRT formula, and solve. We are finding the V, so therefore to find it, the P (pressure) needs to equal the nRT. We would multiple nRT together to get an answer, and divide by the pressure to get the missing unit. To make sure you got the right answer, multiply P and V together to see if it equals nRT. And don't forget to round to the least number of sig figs! Hope I could be of help!