Answer:
The answer to your question is 8.1 g of ZnCl₂
Explanation:
Data
mass of ZnCl₂ = ?
mass of Zn = 7.0 g
mass of CuCl₂ = 8 g
Balanced chemical reaction
Zn + CuCl₂ ⇒ ZnCl₂ + Cu
Process
1.- Calculate the molar mass of the reactants
Zn = 65.4 g
CuCl₂ = 63.6 + (35.5 x 2) = 134.6 g
2.- Calculate the limiting reactant
theoretical yield CuCl₂ / Zn = 134.6/65.4 = 2.06
experimental yield CuCl₂ / Zn = 8/7 = 1.1
The limiting reactant is CuCl₂ because the experimental yield was lower than the theoretical yield.
3.- Use proportions to calculate the mass of ZnCl₂
molar mass of ZnCl₂ = 65.4 + (35.5 x 2) = 136.4 g
134.6 g of CuCl₂ ---------------- 136.4 g of ZnCl₂
8 g ---------------- x
x = (8 x 136.4) / 134.6
x = 8.1 g of ZnCl₂
Answer:
True
Explanation:
Electrons that are in the first energy level (energy level 1) are closest to the nucleus and will have the lowest energy. Electrons further away from the nucleus will have higher energy. An atom's electron shell can accommodate 2n2 electrons, where n is the energy level.
Answer:
V₂ = V₁ / T₁ * T₂ . If you prefer to set the final volume and want to estimate the resulting temperature, then the equation of Charles' law changes to: T2=T1/T1 multiplied by v^2.
Answer:
carbon
Explanation:
tbh im not sure just guessing
