The equation for percent yield is
As such, the theoretical yield or expected yield is, in this case, 122.7g of Pb, the actual in this case is 107.9g so we have
Therefore, the percent yield of her reaction is 89.94%
Answer:
If you were to divide any object into small pieces of unit volume, the density would be the mass of each small piece. Everything is made up of molecules, which in turn are made up of atoms. So every object is created from the aggregation of atoms and molecules.
:)
Explanation:
The balanced reaction equation is as follows.
As it is given that 2.3 times the amount of 
is needed to drive this reaction we can calculate just how much we have, keeping in mind we only need 5 moles of
.
Hence, 
= 11.5 moles of
= 12 (moles approx)
Therefore, it means that 
is our limiting reagent, so product formed will be as follows.
: 
= 1:4 meaning we create 4 moles of
: 
= 1:3 meaning we create 3 moles of 
As, in the given reaction we had 12 moles of , but 5 moles were consumed in the reaction meaning we have:
12 - 5 = 7 moles of
Thus, we will add up all the moles and get the ratios for each gas as follows.
7 + 4 + 3 = 14 moles
![O_{2} = \frac{7}{14} = 0.5 [tex]H_{2}O = \frac{4}{14}](https://tex.z-dn.net/?f=O_%7B2%7D%20%3D%20%5Cfrac%7B7%7D%7B14%7D%20%3D%200.5%0A%3C%2Fp%3E%3Cp%3E%20%20%20%5Btex%5DH_%7B2%7DO%20%3D%20%5Cfrac%7B4%7D%7B14%7D)
= 0.285
= 0.214
Hence, will be consumed completely.
The change u will receive would be 9.99
The equation to be used to
calculate the heat absorbed when solid melts is the enthalpy of melting. It is
represented as H
= mCpT where H is the heat
released after phase change, m is the mass of the substance, Cp is the specific
heat capacity of the substance and T
is the change in temperature.
H
= mCpT
H
= (18g/1000g/kg)(4.184kJ/kg-K)(293-(-263))
H
= 41.87kJ
