The weight of the balloon is irrelevant because it is the gas that lifts it in the air. We are already given with the required volume, so we use this instead. The atomic weight of zinc is 65.38 g/mol. Assuming ideal gas behavior,
PV=nRT
P(475 mL)(1 L/1000 mL) = (1.85/65.38)(0.0821 L·atm/mol·K)(21.5 + 273)
P = 1.44 atm
Then, we use this pressure and the volume to find the moles of zinc.
(1.44 atm)(475 mL+1 mL)(1 L/1000 mL) = n(0.0821 L·atm/mol·K)(21.5 + 273)
Solving for n,
<em>n = 0.02836 moles of zinc</em>
The answer is A.( The reaction is endothermic) I had it on my test and got it right
Answer:
The answer to your question is Combustion
Explanation:
Chemical reaction
2C₄H₁₀ + 13 O₂ ⇒ 8 CO₂ + 10 H₂O
A combustion reaction is a chemical reaction in which the reactants are always a molecule with carbon (organic molecule) and oxygen (O₂), and the products are always carbon dioxide (CO₂) and water (H₂O).
Conclusion
The chemical reaction of this problem is combustion
They are called the terrestrial planets and are smaller than the others. They are he hottest planets and closest to the sun and take less time to rotate the sun.
