A metal block of iron with a mass of 9.10 g is at 73.6°oC. It is added to 99.3 g of water at 13.9°C. What is the final temperature of the block and the water? [cp of aluminum = 0.450 J/g°C] [cp of water = 4.184 J/g°C]

Answer is: hydrogen is being oxidized.chemical reaction: co₂ + h₂ → co + h₂o.oxidation half reaction: h₂ → 2h⁺ + 2e⁻.reduction half reaction: c⁺⁴ + 2e⁻ → c⁺².oxidation is increase of oxidation number, hydrogen change oxidation number from neutral charge (in molecule of hydrogen) to oxidation number +1 (in water).

The surface of the water droplet is held together by the attraction between molecules. in order for water to flow more easily into these small spaces, you need to decrease its surface tension. you can do this by adding soap, which is a surfactant (a material that decreases the surface tension of a liquid).

Needs for population

Sro would be  your answer