2Pb²⁺ + O2 -----> 2Pb⁴⁺ + 2O²⁻
(Pb²⁺-2e ----> Pb⁴⁺) *2
O2 +4e ----->2O²⁻
add 2 last equations
2Pb²⁺-4e+ O2 +4e ----> 2Pb⁴⁺+ 2O²⁻
2Pb²⁺ + O2 -----> 2Pb⁴⁺ + 2O²⁻
Answer: Yes, this is true.
Explanation: It only takes 88 days for Mercury to orbit around the sun. No other planet travels around the sun faster.
Answer:
Gold is an element even when it is in a solution
Answer:
3.1 kg
Explanation:
Step 1: Write the balanced combustion equation
C₈H₁₈ + 12.5 O₂ ⇒ 8 CO₂ + 9 H₂O
Step 2: Calculate the moles corresponding to 1.0 kg of C₈H₁₈.
The molar mass of C₈H₁₈ is 114.23 g/mol.
1.0 × 10³ g × 1 mol/114.23 g = 8.8 mol
Step 3: Calculate the moles of CO₂ produced from 8.8 moles of C₈H₁₈
The molar ratio of C₈H₁₈ to CO₂ is 1:8. The moles of CO₂ produced are 8/1 × 8.8 mol = 70 mol.
Step 4: Calculate the mass corresponding to 70 moles of CO₂
The molar mass of CO₂ is 44.01 g/mol.
70 mol × 44.01 g/mol = 3.1 × 10³ g = 3.1 kg