Answer:
7.38654 in 54 grams
Explanation:
To get moles, you divide grams of a substance by molecular weight. The molecular weight of CO2 is 44 g/mol. 54g divided by 44/mol is 1.227moles.
You then need to multiply moles by Avogadro’s constant (6.022x10^23). That gives you 7.38654x10^23 molecules in 54 grams of CO2.
2Fe + Cl₂ -> 2FeCl
4Fe + 3O₂ -> 2Fe₂O₃
Answer:
It will also change from a solid to a liquid at 24°C while the solid gains energy.
Explanation:
Freezing point is the temperature at which a solid and liquid co-exist.
In other words,it is the temperature at which a solid gains energy to overcome the force of attraction between molecules to become liquid or a liquid looses energy to become a solid.
Hence at 24°C:
- The substance changes from solid to liquid by gaining energy
- The substance changes from liquid to solid by loosing energy
Now let us check the options:
The last two options are wrong since conversion is not between solid and gas.It is between solid and liquid.
The first option is wrong as solid gains energy to become liquid.
Hence the correct answer is second option.
