<span> strictly speaking, a molecule has at least two atoms. ... Atoms with full valence electron shells are stable. Full Text[ edit ] The noble gases are a group of chemical elements that make up Group 18 on the periodic table.</span>
a physical change that can be undone. A final substance can be converted back to the original substance without creating any new material. Freezing, melting, dissolving, boiling, evaporating and condensing are reversible changes.
Explanation:
What did you not understand man?
Answer:
V = 44.83 L
Explanation:
Given data:
Mass of fluorine = 76 g
Temperature = 0°C (0°C + 273 = 273 K)
Pressure = 101.3 Kpa ( 101.3 / 101 = 1 atm)
Volume of fluorine = ?
Solution:
Number of moles of F = Mass/ molar mass
Number of moles = 76 g/ 38 g/mol
Number of moles = 2 mol
Volume of fluorine:
PV = nRT
V = nRT/ P
V = 2 mol × 0.0821 atm. L/ mol. k × 273 k / 1 atm
V = 44.83 L. atm / 1 atm
V = 44.83 L
Answer:
The correct option is: c. Mercury is closer to the Sun
Explanation:
Mercury is the first and the smallest planet of the Solar system that is present <u>closest to the Sun</u>. The surface temperature of this planet ranges from -173 °C-427 °C or 100-700 K.
Due to the small size and high surface temperature of the planet, the gravity can not retain a significant atmosphere.
Whereas, Moon is the only permanent <u>natural satellite of the planet Earth.</u> It is the second most brightest object in the Earth's sky after Sun.
<u>Since Mercury is much closer to the Sun than the Moon. Therefore, Mercury is much hotter than the Moon.</u>
