They cause most of their damage when they reach land
Answer:
Y = 92.5 %
Explanation:
Hello there!
In this case, since the reaction between lead (II) nitrate and potassium bromide is:
![Pb(NO_3)_2+2KBr\rightarrow PbBr_2+2KNO_3](https://tex.z-dn.net/?f=Pb%28NO_3%29_2%2B2KBr%5Crightarrow%20PbBr_2%2B2KNO_3)
Exhibits a 1:2 mole ratio of the former to the later, we can calculate the moles of lead (II) bromide product to figure out the limiting reactant:
![0.125L*0.150\frac{molPb(NO_3)_2}{L} *\frac{1molPbBr_2}{1molPb(NO_3)_2} =0.01875molPbBr_2\\\\0.145L*0.200\frac{molKBr}{L} *\frac{1molPbBr_2}{2molKBr} =0.0145molPbBr_2](https://tex.z-dn.net/?f=0.125L%2A0.150%5Cfrac%7BmolPb%28NO_3%29_2%7D%7BL%7D%20%2A%5Cfrac%7B1molPbBr_2%7D%7B1molPb%28NO_3%29_2%7D%20%3D0.01875molPbBr_2%5C%5C%5C%5C0.145L%2A0.200%5Cfrac%7BmolKBr%7D%7BL%7D%20%2A%5Cfrac%7B1molPbBr_2%7D%7B2molKBr%7D%20%3D0.0145molPbBr_2)
Thus, the limiting reactant is the KBr as it yields the fewest moles of PbBr2 product. Afterwards, we calculate the mass of product by using its molar mass:
![0.0145molPbBr_2*\frac{367.01gPbBr_2}{1molPbBr_2} =5.32gPbBr_2](https://tex.z-dn.net/?f=0.0145molPbBr_2%2A%5Cfrac%7B367.01gPbBr_2%7D%7B1molPbBr_2%7D%20%3D5.32gPbBr_2)
And the resulting percent yield:
![Y=\frac{4.92g}{5.32g} *100\%\\\\Y=92.5\%](https://tex.z-dn.net/?f=Y%3D%5Cfrac%7B4.92g%7D%7B5.32g%7D%20%2A100%5C%25%5C%5C%5C%5CY%3D92.5%5C%25)
Regards!
Answer:
Meteorologists use computer models to predict the weather. And computational power has come an extended way. Yet meteorologists still have trouble correctly predicting the weather over some days. Sometimes they don’t even comprehend right over 24 hours! Why does this happen? Their ability to predict the weather is restricted by the number of available data, the time available to research it, and therefore the complexity of weather events.
Explanation:
It has 7.22 moles.... mole =mass/molar mass
molar mass of H2O=18
130/18=mole