a) Answer:
= 210,000 gram or 210 Kg
Explanation:
14 hr is equivalent to;
= 14 × 3600 s
But;
8.2x10^4 A = 8.2x10^4 Coulomb /second = 8.2x10^4 C/s
1 Faraday = 96485C
Molar mass of Li: 6.941 g/mol
Therefore;
{(8.2x10^4 C/s)×(14×3600s)×(6.941 g/mol)/(96485C/mol)}×70%
= 2.1x10^5 gram or 210 kg
b. Answer;
= 0.23 kWh/mol
Explanation and solution;
Energy per mole is given by;
(96485C/mol) × (8.4V) = 8.10x10^5 (J/mol)
= 8.10x10^5 (Ws/mol)
Divide by 3600s/h to get:
= 8.10x10^5 (Ws/mol)
= 225 Wh/mol
= 0.23 kWh/mol
The amount of sig figs is three.
Hope I helped
48.78%
Percentage of MgSO4 = mass of MgSO4/ mass of sample (MgSO4. 7H20) and multiply it by 100.
Answer:
the answer is 3hours
Explanation:
It was mention in the question
Find the time it takes for a bird that travels 15 miles per hour for 3 HOURS.
HOPE IT HELPED
Answer:
Al + HCl → AlCl₃ + H₂
Its single displacement reaction.
Explanation:
Chemical equation:
2NH₄NO₃ → 2N₂ + 4H₂O + O₂
It is the decomposition reaction in which ammonium nitrate decompose to give nitrogen , water and oxygen.
Chemical equation:
2H₂O₂ → 2H₂O + O₂
It is the decomposition reaction in which hydrogen peroxide decompose to give water and oxygen.
Chemical equation:
2KCl → 2K + Cl₂
It is the decomposition reaction in which potassium chloride decompose to give its constituent elements potassium and chlorine.
Chemical equation:
2Al +6 HCl → 2AlCl₃ +3 H₂
This is single replacement reaction in which aluminium react with HCl and form aluminium chloride and hydrogen.