The heat which we supply to water during boiling is used to overcome these forces of attraction between the particles so that they become totally free and change into a gas. This latent heat does not increase the kinetic energy of water particles and hence no rise in temperature. takes place during the boiling of water.
Answer:
2. liver mortis
Explanation:
This is a physical process. While the individual is alive, the heart circulates the blood. When death occurs, circulation stops and the blood begins to settle, by gravity, to the lowest portions of the body. This results in a discoloration of those lower, dependent parts of the body. Although beginning immediately, the first signs of livor mortis are typically seen about 1 hour following death, with full development being observed 2 to 4 hours following death.
Explanation:
oxygen has a negative charge
sodium has a positive charge
opposites attract
Answer:
Percent yield = 94.5%
Explanation:
Given data:
Number of moles of hydrogen = 4.55 mol
Mass of ammonia recovered = 48.7 g
Percent yield of ammonia = ?
Solution:
Chemical equation:
N₂+ 3H₂ → 2NH₃
Now we will compare the moles of ammonia and hydrogen.
H₂ : NH₃
3 : 2
4.55 : 2/3×4.55 = 3.03 mol
Theoretical yield of ammonia:
Mass = number of moles × molar mass
Mass = 3.03 mol × 17 g/mol
Mass = 51.51 g
Percent yield:
Percent yield = ( actual yield / theoretical yield ) × 100
Percent yield = (48.7 g/ 51.51 g) × 100
Percent yield = 0.945 × 100
Percent yield = 94.5%