<span>Evaporation and condensation occur due to daytime heating of the
water molecules in the lake. They absorb heat and transform, water
molecules rise into the air forming the fog cloud. </span>
From the given, the characteristics that apply for solids are fixed volume, non-compressible, rigid, fixed shape.
<u>Explanation:</u>
Solids are one of the things where the molecules are tightly bonded and packed with strong forces so that the solids reach stable dimensions, stable shape and rigidity, and these are compressible because of strong bonds formed by the inadequate space between the molecules.
Solids are not compressible or easily compressible, because the molecular space between the molecules is too small.
Answer:
c
Explanation:
it must absorb electrical energy
Answer:
The correct answer is 0.089 g/L ≅ 0.09 g/L
Explanation:
Density is defined as: mass/volume.
From the problem we have:
number of moles = n = 3 mol
volume = V = 67.20 L
We have to calculate the mass. For this, we need the molar mass (MM) of the gas. That is easily calculated from the molar mass of the element hydrogen (H), as we know that hydrogen gas has the molecular formula H₂:
MM(H₂) = 2 x molar mass H = 2 x 1 g/mol = 2 g/mol
Now, we multiply n by MM to obtain the mass (m) of the gas:
m = n x MM(H₂) = 3 mol x 2 g/mol = 6 g
Finally, we calculate the density from the mass and volume:
density = m/V = 6 g/(67.20) = 0.089 g/L ≅ 0.09 g/L