Answer:
A. Atoms of new elements are found.
Hey there!
We know that a chemical reaction is balanced when there is the same amount of each element on both sides of the equation.
According to the law of conservation of mass, matter cannot be created or destroyed, so we must have the same amount of each element on each side of a chemical equation.
We count the amount of each element on each side, and the products should have the same number as the reactants.
Hope this helps!
Answer: B. you will need 53.2 g Cl2 for complete reaction and will produce 66.7 g of AlCl3.
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number
of particles.
To calculate the moles, we use the equation:
The balanced reaction is:
2 moles of aluminium react with= 3 moles of chlorine
Thus 0.5 moles of aluminium react with=
moles of chlorine
Mass of chlorine=![moles\times {\text{Molar Mass}}=0.75\times 71=53.2g](https://tex.z-dn.net/?f=moles%5Ctimes%20%7B%5Ctext%7BMolar%20Mass%7D%7D%3D0.75%5Ctimes%2071%3D53.2g)
2 moles of aluminium produce = 2 moles of aluminium chloride
Thus 0.5 moles of aluminium react with=
moles of aluminium chloride
Mass of aluminium chloride=![moles\times {\text{Molar Mass}}=0.5\times 133.34=66.7g](https://tex.z-dn.net/?f=moles%5Ctimes%20%7B%5Ctext%7BMolar%20Mass%7D%7D%3D0.5%5Ctimes%20133.34%3D66.7g)
Thus 53.2 g of chlorine is used and 66.7 g of aluminium chloride is produced.
Ba! It is a metal and wants to lose 2 electrons ASAP