Answer:
I think mixture
Explanation:
Mixture because it is a mixture of water and carbon
Answer:
B it is decomposition reaction
Explanation:
In decomposition reaction compound is broken into two or other elements
Answer:
Diffusion is driven by differences in concentration. When chemical substances such as perfume are let loose in a room, their particles mix with the particles of air. Diffusion in gases is quick because the particles in a gas move quickly. It happens even faster in hot gases because the particles of gas move faster.
According to
Graham's Law of Diffusion,"the rates of diffusion of two gases are inversely proportional to the square root of their Molar masses or Densities at the same pressure and temperature".
r₁ / r₂ =
Where,
r₁ = Rate of Helium
r₂ = Rate of Oxygen
M₂ = Molar mass of Oxygen = 32 g/mol
M₁ = Molar mass of Fluorine = 4 g/mol
Putting values,
r₁ / r₂ =
r₁ / r₂ =
r₁ / r₂ =
2.82
Result:
Helium gas effuses
2.82 times faster than Oxygen gas.
Answer: Change in chemical composition of reactants is an event which must always occur for a chemical reaction to take place.
Explanation:
A chemical reaction is defined as a reaction in which there will always occur change in chemical composition of reactant species.
For example,
Here, chemical composition of both and HCl changes which leads to the formation of silver chloride and nitric acid. Hence, it is a chemical reaction.
Therefore, we can conclude that change in chemical composition of reactants is an event which must always occur for a chemical reaction to take place.