A physical change changes the form of the matter, but does not change the substance itself.
A chemical change affects the substance and turns into a different substance.
Ex:
Physical change: Water freezes- its changes form, but it is still water
Chemical change: Wood burns- it is changing its makeup from wood to ash and various gases. You cant identify it as wood anymore.
Knowledge of chemistry allows the public to make informed decisions
Answer:
1 electron
Explanation:
Look at the periodic table
Li is the 3rd element
now write the electron configuration -> 1s^2 2s^1
the 2nd electron shell has 1 electron as shown above so its 1 electron
Answer:
: 0.5 atm and : 1 atm
Explanation:
In order to calculate the partial pressure for each gas , all you need to do is multiply the mole fraction of each gas with the total pressure.
It is given that = 1.5 atm
The mole fraction of each gas can be calculated in the following way:
= moles of ÷ total moles present =
= moles of ÷ total moles present =
Partial pressure of : 1.5 × = 0.5 atm
Partial pressure of : 1.5 × = 1 atm
Hope that answers the question, have a great day!