Answer:
For 12.8 g there 0.807 × 10³ formula units.
Explanation:
Given data:
Mass of MgCl₂ = 12.8 g
Formula units for given mass = ?
Solution:
First of all we will calculate the number of moles.
Number of moles = mass/molar masss
Number of moles = 12.8 g/ 95.211 g/mol
Number of moles = 0.134 mol
According to the Avogadro number,
one moles = 6.022 × 10³ formula units
For 0.134 mol,
0.134 × 6.022 × 10³ formula units
0.807 × 10³ formula units
For 12.8 g there 0.807 × 10³ formula units.
Answer:
International understanding or internationalism is a feeling that the individual is a not only a member of his country, but a member of the world as well. To ensure world peace. To prevent world wars. To promote human welfare. To promote mutual understanding and interdependence.
% yield = actual yield/ theoretical yield x 100%
4.8946 / 0.4 = 12.2365
% yield = 12.2365 x 100 = 1223.65%
Answer:
NaOH+HCl ----->NaCl+H2O
Explanation:
number mole NaOH = number mole NaOH
M -molarity, V - volume
M(NaOH)*V(NaOH) = M(HCl)*V(HCl)
M(NaOH)*40 ml = 0.2 M*50 ml
M(NaOH)=0.2 M*50 ml/40 ml=1/4 M=0.25 M NaOH
