Answer:
Heat of vaporization.
Explanation:
the amount of energy needed to change the specific amount or gram of liquid in to gas phase is called heat of vaporization.
In this liquid is converted into gas phase as because after the boiling point addition of more energy will cause breakage of bonds present in between the liquid molecules which results in the vaporization of liquid.
Answer:
1.03M
Explanation:
mass/molar mass = moles of solution
50 g / (80+1) = 0.617 mol HBr
molarity*volume = moles
M*0.600 L = 0.617 mol
M = 0.617/0.600 = 1.03 M
Answer:
The mass of oxygen gas dissolved in a 5.00 L bucket of water exposed to a pressure of 1.13 atm of air is 0.04936 grams.
Explanation:
Henry's law states that the amount of gas dissolved or molar solubility of gas is directly proportional to the partial pressure of the liquid.
To calculate the molar solubility, we use the equation given by Henry's law, which is:
where,
= Henry's constant =
= partial pressure of oxygen
We have :
Pressure of the air = P
Mole fraction of oxygen in air =
= Henry's constant =
Putting values in above equation, we get:
Moles of oxygen gas = n
Volume of water = V = 5 L
Mass of 0.001542 moles of oxygen gas:
0.001542 mol × 32 g/mol = 0.04936 g
The mass of oxygen gas dissolved in a 5.00 L bucket of water exposed to a pressure of 1.13 atm of air is 0.04936 grams.
Polarity is induced in the molecules when there are significant electronegativity differences between its atoms. Due to this difference of electronegativity, one atoms pulls shared electrons more towards itself and gets partial negative charge while the other atoms that has less electronegativity gets a partial positive charge.This electronegativity difference creates poles and a dipole moment in the whole molecule. The example of such a polar molecule is H2O.
However, sometimes the molecule is composed of atoms that have substantial electronegativity differences but still the molecule is not polar.
Why ?
Because the polar bonds are organized in a symmetrical way, in a way that the dipole moment of whole molecule becomes zero. This is because bond polarity is cancelled because of a symmetrical shape.
Take the example of carbon tetrachloride or CCL4. No doubt, chlorine and carbon have electronegativity difference and the molecule should be polar, but in actual it is not polar. If you look at the structure of CCl4 in attached figure, you can see that you can see that the shape of molecule is symmetrical. There is one bond on right and left each side of carbon , which cancel the net polarity of each other. One bond is on top and bottom of carbon each, that cancel the dipole moment of each other. Though electronegativity difference still exists but the overall molecule is non-polar. However, when the molecule reacts with some other atom or molecule and replaces chlorine atoms, the symmetry is broken and the resultant molecule becomes polar.
Hope it helps! :)
Answer:
Final mass of Iron bar will be 621.105 g.
Mass of rust = 126.730 g
Explanation:
Exactly one- eighth of the Iron turns to rust. That means, the mass of Iron that under go the process of rusting() = 565 × = 70.625 g
So, the mass of pure Iron after rusting will be = 565 - 70.625 = 494.375 g
Now the reaction of rusting as follows,
2Fe + →
Now, molecular weight of Iron = 55.84 g
So, moles of Iron undergoes the reaction is = = 1.26 mol
Molecular weight of = 159.68 g
Here 2 moles of Iron undergoes the reaction to produce 2 moles of Iron oxide.
Hence, 1.26 mol of Iron will produce 1.26 mole of Iron oxide.
Mass of = = 126.730 g
∴Mass of rust = 126.730 g
∴ Final mass of Iron bar = ( 494.375 + 126.730) = 621.105 g