Answer:
Approximately .
Explanation:
Look up the specific heat of gaseous neon:
.
Calculate the required temperature change:
.
Let denote the mass of a sample of specific heat . Energy required to raise the temperature of this sample by :
.
For the neon gas in this question:
Calculate the energy associated with this temperature change:
.
Answer:
False
Explanation:
Phosphorus is number 15 on the periodic table, so its electronic configuration is:
After 3 half-lives, 125 grams of the parent isotope will remain.
Answer:
5 moles of Argon is present in the mixture.
Explanation:
Total pressure of the gaseous mixture = 4 atm
Total number of moles = 16
Partial pressure of Ne = 2.75 atm
By Dalton's law of partial pressure, the total pressure of gaseous mixture is the sum of partial pressures of individual gases which are non-reactive.
Hence:
Also :
Partial pressure = mole fraction*total pressure
∴Number of moles of Argon = 5
Yes a physical change can do that. A chemical change is like a burning candal