Answer:
Mass = 239.62 g
Explanation:
Molality is given as,
m = Moles of Solute / Kg of Solvent --- (1)
Data Given;
Molality = 1.5 m
Mass of Solvent = 750 g = 0.75 Kg
Solving eq. 1 for Moles,
Moles = Molality × Mass of Solvent
Putting values,
Moles = 1.5 mol.Kg⁻¹ × 0.75 Kg
Moles = 1.125 mol
Calculating mass from moles,
Moles = Mass / M.mass
Or,
Mass = Moles × M.mass
Putting values,
Mass = 1.125 mol × 213 g.mol⁻¹
Mass = 239.62 g
Answer:
B
The chemical formula does not show how the atoms are connected to one another
Answer:
Explanation:
Hello,
In this case, mercury (II) oxide (HgO) is obtained via the reaction:
Nonetheless, since it is a reaction carried out in basic solution, mercury's half-reaction only, must be:
Thus, it is seen that OH ionis should be added due to the basic aqueous solution considering that 2 electrons are transferred from 0 to 2 in mercury.
Best regards.
Answer:
The answer to your question is 0.35 moles of ZnCl₂
Explanation:
Data
moles of ZnCl₂ = ?
mass of Zn = 23 g
mass of CuCl₂ = excess
Balanced chemical reaction
Zn + CuCl₂ ⇒ ZnCl₂ + Cu
Process
1.- Convert the mass of Zn to moles
-Look for the atomic mass of Zn
Atomic mass = 65.4 g
-Convert the grams to moles
65.4 g -------------- 1 mol
23 g ---------------- x
x = (23 x 1)/65.4
x = 23 / 65.4
x = 0.35 moles of Zn
2.- Calculate the moles of ZnCl₂ using proportions and cross multiplication, and the coefficients of the balanced chemical reaction.
1 mol of Zn ---------------- 1 mol of ZnCl₂
0.35 moles of Zn -------- x
x = (0.35 x 1) / 1
x = 0.35 moles of ZnCl₂
I will try my best to sovle this question...
Im Pretty sure it has to be A. it needs to balance it would not stand in place if not balanced.
