Answer:
A pineapples bananas
because you have to peel them
How am I supposed to know >:(
Answer:
Explanation:
Firstly determine heat absorbed by the ice-cube while it is melting:
Now the temperature of the coffee when the ice has melted:
Since both the substances eventually reach thermal equilibrium then they both must have the same final temperature.
By solving this, equation achieved is:
The reaction between Al(s) and Cd²⁺(aq) is:
Al(s) + Cd²⁺(aq) → Al³⁺(aq) + Cd(s)
The half reactions are:
Al³⁺(aq) + 3 e⁻ → Al(s) E⁰ = -1.66 V
Cd²⁺(aq) + 2 e⁻ → Cd(s) E⁰ = -0.40 V
Reverse the first equation and add to the second one
2 Al(s) + 3 Cd²⁺(aq) → 2 Al³⁺(aq) + 3 Cd(s)
So, the overall cell potential is:
E⁰cell = 1.66 - 0.40 = 1.26 V
Free energy of the reaction is:
ΔG⁰ = -n F E⁰cell
= - 6 mol e⁻ * (96485 C / mol e⁻) * (1.26 V)
= - 7.29 x 10⁵ J
The answer is:
There are 3.6 X 10^24 hydrogen atoms.
The explanation:
1.4 moles of methane will contain 1.4*Avogadro's number
= 1.4*(6.02 X 10^23) = 8.4 X 10^23 methane molecules. But, since the formula for methane is CH4, there are 4 hydrogen atoms for each methane molecule. Thus, 1.4 moles of methane contain
4*(8.4 X 10^23) = 3.6 X 10^24 hydrogen atoms.
