Answer: option B. 0.020 mole
Explanation:Please see attachment for explanation
D. Zn + Ca²⁺ → Zn²⁺ + Ca
Because Ca is more active metal (from the electrochemical series).
Answer:
n = 0.072 mol
Explanation:
Given data:
Volume of gas = 3.80 L
Temperature of gas = 320 K
Pressure of gas = 0.496 atm
Number of moles of Ar gas = ?
Solution:
The given problem will be solve by using general gas equation,
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 0.0821 atm.L/ mol.K
T = temperature in kelvin
Now we will put the values.
n = PV/RT
n = 0.496 atm ×3.80 L / 0.0821 atm.L/ mol.K × 320 K
n = 1.88 /26.27 /mol
n = 0.072 mol
