Answer:
900 K
Explanation:
Recall the ideal gas law:
![\displaystyle PV = nRT](https://tex.z-dn.net/?f=%5Cdisplaystyle%20PV%20%3D%20nRT)
Because only pressure and temperature is changing, we can rearrange the equation as follows:
![\displaystyle \frac{P}{T} = \frac{nR}{V}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20%5Cfrac%7BP%7D%7BT%7D%20%3D%20%5Cfrac%7BnR%7D%7BV%7D)
The right-hand side stays constant. Therefore:
![\displaystyle \frac{P_1}{T_1} = \frac{P_2}{T_2}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20%5Cfrac%7BP_1%7D%7BT_1%7D%20%3D%20%5Cfrac%7BP_2%7D%7BT_2%7D)
The can explodes at a pressure of 90 atm. The current temperature and pressure is 300 K and 30 atm, respectively.
Substitute and solve for <em>T</em>₂:
![\displaystyle \begin{aligned} \frac{(30\text{ atm})}{(300\text{ K})} & = \frac{(90\text{ atm})}{T_2} \\ \\ T_2 & = 900\text{ K}\end{aligned}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20%5Cbegin%7Baligned%7D%20%5Cfrac%7B%2830%5Ctext%7B%20atm%7D%29%7D%7B%28300%5Ctext%7B%20K%7D%29%7D%20%26%20%3D%20%5Cfrac%7B%2890%5Ctext%7B%20atm%7D%29%7D%7BT_2%7D%20%5C%5C%20%5C%5C%20T_2%20%26%20%3D%20900%5Ctext%7B%20K%7D%5Cend%7Baligned%7D)
Hence, the temperature must be reach 900 K.
Given :
0.26 mole of
and 0.35 L of water.
To Find :
The molarity of a solution of
made by mixing 0.26 mole of potassium
phosphate with water up to 0.35 L .
Solution :
We know, molarity is given by :
![M = \dfrac{number \ of \ moles }{Volume \ in \ Liter}\\\\M = \dfrac{0.26}{0.35}\ M\\\\M = 0.743 \ M](https://tex.z-dn.net/?f=M%20%3D%20%5Cdfrac%7Bnumber%20%5C%20of%20%5C%20moles%20%7D%7BVolume%20%5C%20in%20%5C%20Liter%7D%5C%5C%5C%5CM%20%3D%20%5Cdfrac%7B0.26%7D%7B0.35%7D%5C%20M%5C%5C%5C%5CM%20%3D%200.743%20%5C%20M)
Therefore, the molarity of
solution is 0.743 M.
Answer:
PbBr₄
C₂O₆
Al₂S₃
Explanation:
Lead (IV) bromide
This is an ionic compound. Ionic compounds do not tell you how many of each atom you have in the name. You have to figure out how much there is based on the charges of the atoms.
The (IV) means that lead has a charge of +4. The charge is put in parentheses since lead is a transition metal, and the charge of a transition metal can vary. Bromine, on the other hand, is always assumed to have a charge of -1. When making a molecular formula, you need to have enough of each atom so that the charges cancel out.
Dicarbon hexoxide
This is a covalent compound. Covalent compounds will tell you how much of each atom you have in the name.
Dicarbon means two carbons. Hexoxide means six oxygens.
Aluminum sulfide
Aluminum sulfide is an ionic compound.
Aluminum has a charge of +3. Sulfur has a charge of -2.
Answer:
11.76
Explanation:
Potassium hydroxide is a strong base that dissociates completely according to the following reaction.
KOH(aq) → K⁺ + OH⁻
Then, the concentration of OH⁻ will be 0.00580 M.
The pOH of the solution is:
pOH = -log [OH⁻]
pOH = -log 0.00580 = 2.24
We can calculate the pH using the following expression.
pH + pOH = 14
pH = 14 - pOH = 14 - 2.24 = 11.76
Condensation, because it is a phase change from gas to liquid