Answer: Option (c) is the correct answer.
Explanation:
Wood is a mixture of different substances. Primarily it consists of cellulose, lignin, water etc.
When we heat wood then all these substance oxidize into the atmosphere even before they could melt.
Whereas iron, sodium chloride and ethanol all are the substances which can melt at any temperature.
Thus, we can conclude that out of the given options, wood, a mixture of different substances is a material that does not melt at any temperature.
Answer:
14.7 lbs
Explanation:
Air pressure is the weight of the air above us. It is approximately 14.7 pounds or lbs per square inch at sea level. It means that an air column weights 14.7 lbs, 1 square inch in diameter, reaching all the way up to the top of the atmosphere.
Answer: Conduction is the process by which heat energy is transmitted through collisions between neighboring atoms or molecules. ... The fire's heat causes molecules in the pan to vibrate faster, making it hotter. These vibrating molecules collide with their neighboring molecules, making them also vibrate faster.
HOPE THIS HELPS
Answer:
Metals ions are oxidized because oxidation always occurs at cathode
Explanation:
Answer:
11.83.
Explanation:
<em>∵ pOH = - log[OH⁻]</em>
∵ [OH⁻] = √(Kb.C),
Kb = 1.8 x 10⁻⁵, C = 2.5 M.
∴ [OH⁻] = √(Kb.C) = √(1.8 x 10⁻⁵)(2.5 M) = 6.71 x 10⁻³ M.
∴ pOH = - log[OH⁻] = - log(6.71 x 10⁻³ M) = 2.17.
∵ pH + pOH = 14.
<em>∴ pH = 14 - pOH =</em> 14 - 2.17 = <em>11.83.</em>
