A skateboard coasting on a flat surface slows down and then comes to a stop because the skateboard runs out of energy, and slows down, also, sense it is on a flat surface and not going downhill, it goes slower.
Answer:
Explanation:
You calculate the energy required to break all the bonds in the reactants.
Then you subtract the energy needed to break all the bonds in the products.
CH₃CH₂OH + 3O₂ ⟶ 2CO₂ + 3H₂O
Bonds: 5C-H 1C-C 1C-O 1O-H 3O=O 4C=O 6O-H
D/kJ·mol⁻¹: 413 347 358 467 495 799 467
Could you type out the equation? I can't see the picture.
Answer:
This is true. A hot glass does look the same as a cold glass. Glass won't change its look if it's below 648 degrees Celsius.
A solution of a pH of 4 has 10 times the concentrations of H+ present compared to a solution with a pH of 5, where;
pH = - log [H+], the concentration of H+ of pH=4 is:
[H+] = anti Log (- pH) = 10 ^ - pH = 10 ^ - 4 = 0.0001 M >>>>> (1)
the concentration of H+ of pH = 5 is
10^ -5 = 0.00001 M >>>>> (2)
So, (1) more than (2) by 10 times
