Memorize that molarity = moles/liters and you can get these
Answer:
40 g/mol, Argon
Explanation:
We can find the number of moles of the gas by using the equation of state for an ideal gas:
where
is the pressure of the gas at STP
is the volume of the gas
n is the number of moles
is the gas constant
is the absolute temperature of the gas at STP
Solving for n, we find:
Now we can find the molar mass of the gas, which is given by
where
m = 5.28 g is the mass of the gas
n = 0.132 mol is the number of moles
Substituting,
So, the gas in this problem is Argon, which has a molar mass of 40 g/mol.
Answer:
A voltaic cell
Explanation:
A voltaic cell is a device which converts chemical energy to electrical energy. The chemical reactions that take place inside the cell causes electrons to flow from anode to cathode hence, electricity is produced. A simple voltaic cell is made by placing two different metals in contact with an electrolyte separated by a salt bridge. The cathode is the negative electrode while the anode is the positive electrode. It is also called a galvanic cell.
In a voltaic cell having a copper/copper solution half cell, reduction occurs at the cathode. Hence, at the cathode copper II ions accept two electrons and become reduced to ordinary metallic copper. This causes the blue colour of the solution to become discharged (fade) as the cell continues to function.
The answer is silicon because it’s atomic number is 14
Answer:
It requires added energy.
Explanation: