Answer:
![C_{Fe}=0.096 \frac{cal}{g*C}](https://tex.z-dn.net/?f=C_%7BFe%7D%3D0.096%20%5Cfrac%7Bcal%7D%7Bg%2AC%7D)
Explanation:
The energy gained by the water:
![E=\Delta T*C*V* \rho](https://tex.z-dn.net/?f=E%3D%5CDelta%20T%2AC%2AV%2A%20%5Crho)
![E=(33.2 - 20)C*\frac{1 cal}{g*C}*35 mL*1 g/mL](https://tex.z-dn.net/?f=E%3D%2833.2%20-%2020%29C%2A%5Cfrac%7B1%20cal%7D%7Bg%2AC%7D%2A35%20mL%2A1%20g%2FmL)
![E=462 cal](https://tex.z-dn.net/?f=E%3D462%20cal)
This energy is equal to the energy lost by the iron:
![E=\Delta T*C_{Fe}*m_{Fe}](https://tex.z-dn.net/?f=E%3D%5CDelta%20T%2AC_%7BFe%7D%2Am_%7BFe%7D)
In equlibrium the T of the iron and the water are the same
<em>(the negative sign is because the iron loses the energy)</em>
![C_{Fe}=0.096 \frac{cal}{g*C}](https://tex.z-dn.net/?f=C_%7BFe%7D%3D0.096%20%5Cfrac%7Bcal%7D%7Bg%2AC%7D)
Hi!
To make 500 mL of a 1,500 M solution of NaCl you'll require
43,83 g
To calculate that, you will need to use a conversion factor to go from the volume of the 1,500 M solution to the required grams. For this conversion factor, you'll use the definition for Molar concentration (M=mol/L) and the molar mass of NaCl. The conversion factor is shown below:
![gNaCl=500mLsol* \frac{1L}{1000 mL}* \frac{1,500 mol NaCl}{1Lsol}* \frac{58,4428 g NaCl}{1 mol NaCl} \\ =43,83gNaCl](https://tex.z-dn.net/?f=gNaCl%3D500mLsol%2A%20%5Cfrac%7B1L%7D%7B1000%20mL%7D%2A%20%5Cfrac%7B1%2C500%20mol%20NaCl%7D%7B1Lsol%7D%2A%20%5Cfrac%7B58%2C4428%20g%20NaCl%7D%7B1%20mol%20NaCl%7D%20%5C%5C%20%3D43%2C83gNaCl%20%20%20)
Have a nice day!
Answer:
weight of salt = 90 gram,
solubility = 50
sing formula
solubility of solute =
weightofsolventinsaturatedsolution
weightofsoluteinsaturatedsolution
×100
or 50=
weightofsolventinsaturatedsolutio
90gm
×100
so weight of solvent in saturated solution =
50
90gm
×100=180gm
Hence 180 gm of water is required to prepare a saturated solution.
Take a look at this and see if you can get an understanding and explain it in oxidation numbers
Answer:
b
Explanation:
A pure substance has a constant composition and cannot be separated into simpler substances by physical means. There are two types of pure substances: elements and compounds.