Ions are formed when atoms lose or gain electrons in order to fulfill the octet rule and have full outer valence electron shells. When they lose electrons, they become positively charged and are named cations. When they gain electrons, they are negatively charged and are named anions.
Answer:
C) surface tension
Explanation:
Surface tension is the stretching force on a liquid's surface film caused by bulk liquid particles attracting themselves in the surface layer, which minimises surface area of the liquid.
The surface tension water is high as the strong hydrogen bonds of the on the surface
pull the water molecules together. As such a water drop will tend to occupy the smallest area on the surface.
Water surface tension is 72 dynes/cm at 25°C . That means 72 dynes of force is required to break a water surface film of 1 cm long. Water surface tension varies inversely with temperature. Surface tension of water is as a result of water molecule's polar nature of the and hydrogen bonding.
Answer:
1 mole
Explanation:
To get the answer to this, we need to write the correct chemical equation:
HCl + NaOH ------》NaCl + H2O
As seen in the balanced chemical equation above, one mole of hydrochloric acid will react with one mole of sodium hydroxide to yield one mole of sodium chloride and one mole of water
Answer:
As Per Given Information
Given mass of H₂O₂ ( Hydrogen Peroxide) 4.0 gm
We've been asked to find the number of moles in Hydrogen Peroxide .
First we calculate molecular mass of Hydrogen Peroxide .
Molecular mass of H₂O₂ = 1×2 + 16 × 2
Molecular mass of H₂O₂ = 2 + 32
Molecular mass of H₂O₂ = 34 gm
Now find the number of moles in given hydrogen peroxide .
Put the given value we obtain
So, the number of moles is 0.117 .