Answer:
20 mol
Explanation:
First, balance the chemical reaction
C3H8 + 5O2 --> 4H2O + 3CO2
Using the mole ratio, we can multiply the moles of propane by 4 to find the moles of H2O.
5 × 4= 20
20 mol
if da ceiling in a square that means it has four sides. If each side is 39 feet and there are four sides you would multiply 39 times 4 which equals 156. If one can of paint can cover 169 ft.² and the ceiling is only 156 ft.² then you would only need 1 CAN OF PAINT.
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.
Answer:
The depth of the lake is 67.164 meters.
Explanation:
The combined gas equation is,
where,
= initial pressure of gas in bubble= ?
= final pressure of gas = 0.980 atm
= initial volume of gas = 
= final volume of gas = 8.00 × V
= initial temperature of gas = 
= final temperature of gas = 
Now put all the given values in the above equation, we get:
pressure of the gas in bubble initially is equal to the sum of final pressure and pressure exerted by water at depth h.
Where :
density of water = 
g = acceleration due gravity = 
h = 67.164 m
The depth of the lake is 67.164 meters.
To find the molarity of the compound, simply determine the molar mass of MgCl2 and then convert 50 g to moles using the molar mass of the compound. Then convert 150 ml to L = 0.15 L
Then divide the moles amount by the volume in L.
