The purpose is to help you estimate the total distance because a map is zoomed out so they need to scale it down so its small and the scale helps make the distance accurate.
Answer: the solution 1.0 M Ca Br2.
This is becasue the freezing point depression is a colligative property.
A collegative property is one that depends on the number of particles in solution.
Each mole of KBr will produce two moles, one mole of potassium ion and one of bromine ion
Each mole of CaBr2 will produce three moles, one of calcion ion and two of bromine ion.
Then, the depression of the frezzing point will be greater in the case of the CaBr2, leading to a lower freesing point of the 1.0 M soluction.
Answer:
0.001341 mol/L s is the average rate from 8.0 to 20.0 seconds.
Explanation:
![2 AX_2(g)\rightarrow 2 AX(g) + X_2(g)](https://tex.z-dn.net/?f=2%20AX_2%28g%29%5Crightarrow%202%20AX%28g%29%20%2B%20X_2%28g%29)
Average rate of the reaction =![R_a](https://tex.z-dn.net/?f=R_a)
![R_a=-\frac{\Delta [x]}{\Delta T}=-\frac{x_2-x_1}{t_2-t_1}](https://tex.z-dn.net/?f=R_a%3D-%5Cfrac%7B%5CDelta%20%5Bx%5D%7D%7B%5CDelta%20T%7D%3D-%5Cfrac%7Bx_2-x_1%7D%7Bt_2-t_1%7D)
=Average rate of the reaction during the given time interval.
= Change in concentration of reactant with respect to time.
= Change in time.
=Concentration of reactant at time![t_1](https://tex.z-dn.net/?f=t_1)
=Concentration of reactant at time![t_2](https://tex.z-dn.net/?f=t_2)
So, at
the concentration of
:
![x_1=0.0249 mol/L](https://tex.z-dn.net/?f=x_1%3D0.0249%20mol%2FL)
And at
the concentration of
:
![x_2=0.0088 mol/L](https://tex.z-dn.net/?f=x_2%3D0.0088%20mol%2FL)
The average rate of the reaction at given interval will be given as:
![R_a=-\frac{x_2-x_1}{t_2-t_1}=-\frac{0.0088 mol/L-0.0249mol/L}{20.0s-8.0 s}=0.001341 mol/L s](https://tex.z-dn.net/?f=R_a%3D-%5Cfrac%7Bx_2-x_1%7D%7Bt_2-t_1%7D%3D-%5Cfrac%7B0.0088%20mol%2FL-0.0249mol%2FL%7D%7B20.0s-8.0%20s%7D%3D0.001341%20mol%2FL%20s)
0.001341 mol/L s is the average rate from 8.0 to 20.0 seconds.
Answer:
Steel is less malleable.
Explanation:
Steel is less malleable than the elements that make it because of the presence of carbon in it. Steel is an alloy of iron and carbon which is harder than iron because of the presence of carbon. Iron in its pure form is softer that able the atoms slip over one another. If carbon is added, they stop the iron atoms from sliding apart so easily. This makes the metal stronger and harder.