Hi there! Calvin informed Marie that they could still incorporate solute until reaching 40 grams because the solution remained unsaturated. Unsaturated solutions denote situations where the solvent (water in this instance) can further dissolve more solute (here, KNO₃) considering the current pressure and temperature. This can be visually confirmed when additional solute does not lead to visible solid residues settling at the bottom of the flask, indicating that the dissolving rate surpasses the crystallization rate. Wishing you a pleasant day!
<span>128 g/mol
Applying Graham's law of effusion, we can utilize the formula:
r1/r2 = sqrt(m2/m1)
where
r1 = effusion rate of gas 1
r2 = effusion rate of gas 2
m1 = molar mass of gas 1
m2 = molar mass of gas 2
Given that the atomic weight of oxygen is 15.999, the molar mass of O2 = 2 * 15.999 = 31.998.
We can now insert the known values into Graham's equation to find m2.
r1/r2 = sqrt(m2/m1)
2/1 = sqrt(m2/31.998)
4/1 = m2/31.998
Thus, we find m2 to be 127.992.
Rounding to three significant figures yields 128 g/mol</span>
A skeletal formula is usually used for organic compounds
C. The molecule N₂ does not undergo transitions in electronic energy levels due to visible light, whereas transitions occur in I₂ molecules due to visible light.
Explanation:
Molecule absorption of light results in electronic transitions from a ground level to an elevated level matching the energy of the absorbed light.
For nitrogen (N₂), permissible electronic transitions require energy differences corresponding to ultraviolet photon energy. Thus, nitrogen remains colorless as it does not absorb visible light. In contrast, iodine (I₂) facilitates electronic transitions corresponding to visible light photon energies, which gives iodine vapors their violet hue.
Learn more about:
electronic transitions
1. The creation of the initial microscope was credited to Hans and Zacharias Janssen. 2. Robert Hooke introduced the term "cell." 3. Anton van Leeuwenhoek discovered tiny organisms he referred to as "animalcules." 4. Matthias Schleiden suggested that plants consist of cells. 5. Theodor Schwann proposed that animals are composed of cells. 6. Rudolf Virchow declared that all cells stem from previously existing cells.
