C. The salt bridge maintains the flows of ions and allows electrons to move from the anode to the cathode.
The solution for this problem would be:
The mass of P4O10 is computed by: 0.800 mol x 284 g/mol = 227g t = 15.0 s ( 1 min / 60 s) = 0.25 min
So solving for the rate will be mass over t = m/t = 227/0.25 = 908 g/min would be the answer for this problem.
Answer:
The density of O₂ gas is 1.71 
Explanation:
Density is a quantity that allows you to measure the amount of mass in a given volume of a substance. So density is defined as the quotient between the mass of a body and the volume it occupies:

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:
P * V = n * R * T
So, you can get:

The relationship between number of moles and mass is:

Replacing:


So:

Knowing that 1 mol of O has 16 g, the molar mass of O₂ gas is 32
.
Then:

In this case you know:
- P=1.27 atm
- molar mass of O₂= 32
.
- R= 0.0821

- T= 16 °C= 289 °K (0°C= 273°K)
Replacing:

Solving:
density= 1.71 
<u><em>The density of O₂ gas is 1.71 </em></u>
<u><em></em></u>
Answer:
The number of atoms in the gemstones of that tiara is
.
Explanation:
Number of diamonds ion tiara = 888
Mass of each diamond = 1.0 carat = 0.200 g (given)
Mass of 888 diamonds in tiara:

Given that diamond is a form of carbon.
Atomic mass of carbon atom = 12 g/mol
Moles of 77.600 g of carbon =
Number of atoms of carbon 14.800 moles:

The number of atoms in the gemstones of that tiara is
.
Answer:
(3) the partial pressure of carbon dioxide above the solution is reduced.
Explanation:
We know , Soda water contains pressured carbon dioxide pressured with cap because we know according to Henry's law partial pressure of the gas is directly proportional to pressure applied. Therefore,
is pressurized in the bottle.
But as we open the bottle the pressure decreases the excess
(and air) escapes producing effervescence and partial pressure of
decreases. ( Because of Henry's Law)
Hence, it is the required solution.