Answer:
47.2 g
Explanation:
Let's consider the following double displacement reaction.
3 FeCl₂ + 2 Na₃PO₄ → Fe₃(PO₄)₂ + 6 NaCl
The molar mass of Fe₃(PO₄)₂ is 357.48 g/mol. The moles corresponding to 44.3 g are:
44.3 g × (1 mol / 357.48 g) = 0.124 mol
The molar ratio of Fe₃(PO₄)₂ to FeCl₂ is 1:3. The moles of FeCl₂ are:
3 × 0.124 mol = 0.372 mol
The molar mass of FeCl₂ is 126.75 g/mol. The mass of FeCl₂ is:
0.372 mol × (126.75 g/mol) = 47.2 g
The correct option would be the fact that both bonding electrons had come from the oxygen to form this chemical bond.
The other options are not true.
Answer:
P₂ = 1530.1 KPa
Explanation:
According to Bolye's Law,
The volume of given mass of a gas is inversely proportional to the pressure applied on it at a constant temperature.
V∝1/P
V = kP
V = K/P
PV = k
According to this equation,
P₁V₁ = P₂V₂
Given data:
Initial volume = 456 dm³
Initial pressure = 101 KPa
Final volume = 30.1 dm³
Final pressure = ?
Solution:
Formula:
P₁V₁ = P₂V₂
P₂ = P₁V₁ / V₂
P₂ = 101 KPa × 456 dm³ / 30.1 dm³
P₂ = 46056 / 30.1 dm³
P₂ = 1530.1 KPa
