Answer:Set up a proportion os V1/n1 = V2/n2. V is the volume, n is the amount in MOLES, not grams. Convert the CO_2 to moles, then solve and find that the amount of N_2 should be the same amount of moles. Then use the molar mass of N_2 (28.02 grams/mole) to convert that amount of moles into grams. That's your answer.
Explanation:
Answer:
Explanation:
A <em>combustion reaction</em> is the reaction with oxygen along with the release of energy in form of heat or light.
Organic compounds (like CH₄) undergo combustion forming water and CO₂.
The combustion reaction of CH₄ is:
Hence, the first equation from the choices is not showing the combustion reaction of CH₄.
Not only organic compounds can undergo combustion. Metals and no metals can undergo combustion, i.e. metals and no metals can react with oxygen releasing light or heat.
The reaction of copper and oxygen (second choice) is a combustion reaction:
The formation of water (2H₂ + O₂ → 2H₂O) is other example of a combustion reaction where no organic compounds are involved.
On the other hand, the other two equations from the choice list are not reactions with oxygen, so they do not show combustion reactions.
Negative ions are attracted to the anode. In the process of electrolysis, current can flow through a liquid because negative ions are attracted to the anode.
Answer:
1,100 Joules of heat is released when 50.0 g of ethanol cools from 90 °C to 79 °C.
Explanation:
Mass of an ethanol = 50.0 g
Specific heat capacity of the ethanol vapor's = c = 2.0 J/g°C
Initial temperature of the ethanol vapors = 90 °C
Final temperature of the ethanol vapors = 79°C
Heat released on cooling of ethanol vapors = Q
![Q=m\times c\times (T_2-T_1)](https://tex.z-dn.net/?f=Q%3Dm%5Ctimes%20c%5Ctimes%20%28T_2-T_1%29)
![Q=50.0 g\times 2.0 J/g^oC\times (79^oC-90^oC)](https://tex.z-dn.net/?f=Q%3D50.0%20g%5Ctimes%202.0%20J%2Fg%5EoC%5Ctimes%20%2879%5EoC-90%5EoC%29)
![Q=-1,100 J](https://tex.z-dn.net/?f=Q%3D-1%2C100%20J)
Negative sign indicates that the heat is released into the surroundings.
1,100 Joules of heat is released when 50.0 g of ethanol cools from 90 °C to 79 °C.