Answer:
60.7%
Explanation:
Molar mass of NaCl = 23 +35.5
= 58.5 g/mol
Molar mass of Cl = 35.5 g/mol
Percentage by mass of Cl =?
The percentage by mass of Cl in NaCl can be obtained as shown below'
Percentage by mass = mass of element / mass of the compound × 100
Percentage by mass of Cl
= 35.5 / 58.5 × 100
= 3550 / 58.5
= 60.7%
Therefore, the percentage by mass of Cl in NaCl is 60.7%
I think it's D but not sure
Greenhouse gases are more efficient at absorbing thermal energy and re-radiating it than the other atmospheric gases.
<h2>Answer:</h2>
The correct answer is option C which is,<u> "Water molecules at the surface experience fewer hydrogen bonds than water molecules within the liquid".</u>
<h3>Explanation:</h3>
- In some conditions, a water droplet remains in the droplet form on the dry surface rather than spreading on the whole surface. It covers only remains on the mall part of the surface and making a dome shape.
- It is due to the fact that the hydrogen bond between the water molecules is much strong than the attraction between the water molecules and surface.
- Hence the option C is correct.
