Answer:
initial temperature=![-3.31^{\circ}C](https://tex.z-dn.net/?f=-3.31%5E%7B%5Ccirc%7DC)
Explanation:
Assuming that the given follows the ideal gas nature;
![P_1=0.723atm](https://tex.z-dn.net/?f=P_1%3D0.723atm)
![V_1=13.5L](https://tex.z-dn.net/?f=V_1%3D13.5L)
![T_1=?](https://tex.z-dn.net/?f=T_1%3D%3F)
![P_2=0.612atm](https://tex.z-dn.net/?f=P_2%3D0.612atm)
![V_2=17.8L](https://tex.z-dn.net/?f=V_2%3D17.8L)
![T_2=28 ^{\circ}C =273+28K=301K](https://tex.z-dn.net/?f=T_2%3D28%20%5E%7B%5Ccirc%7DC%20%3D273%2B28K%3D301K)
mole of gass will remain same at any emperature:
![\frac{P_1V_1}{T_1} =\frac{P_2V_2}{T_2}](https://tex.z-dn.net/?f=%5Cfrac%7BP_1V_1%7D%7BT_1%7D%20%3D%5Cfrac%7BP_2V_2%7D%7BT_2%7D)
putting all the value we get:
![T_2 =269.7K =-3.31 ^{\circ} C](https://tex.z-dn.net/?f=T_2%20%3D269.7K%20%3D-3.31%20%5E%7B%5Ccirc%7D%20C)
initial temperature=![-3.31^{\circ}C](https://tex.z-dn.net/?f=-3.31%5E%7B%5Ccirc%7DC)
Answer:0.0922 Fahrenheit per minute
Explanation: Temperature change in degree Fahrenheit from Celsius is given by multiplying the change in temperature in celsius by 1.8 and adding 32 to it. Now the temperature you added is in Fahrenheit. But the temperature change is for a day. To convert change in temperature per day to per minute divide the obtained answer in Fahrenheit by 24*60.
Thus,
change in temperature in Fahrenheit: (56*1.8)+32= 132.8 degree Fahrenheit
change in temperature per minute: (132.8)/(24*60)= 0.0922 degree Fahrenheit per minute
Atomic number = protons
Protons = P Electrons = E P = E
Atomic mass = Neutrons + Protons
Atomic number = atomic mass = neutrons
P = E
AM - AN = N
Example:
Calcium = 20 Protons 20P = 20E
Atomic mass - atomic number = neutrons :)
Answer:
what does it mean?
if u could tell it to me...i would be thankful to ya
Regards
When determining the percentage by mass of a solution, the mass of the solvent is measured last.
<h3>What is the percentage by mass of a solvent?</h3>
The percentage by mass of a solvent in a solution is the ratio of the mass of the solvent and the mass of the entire solution.
Mathematically, this can be expressed as:
Percentage by mass of solvent = mass of solvent/mass of solution x 100
Thus, given a solution, a weighing balance, an evaporating dish, and a burner:
- The mass of the evaporating dish is determined first (A)
- The mass of the evaporating dish and the solution next (B)
- Next would be to heat the solution to remove the solvent.
- The mass of the evaporating dish plus the residue is then measured (C).
Thereafter, the amount of solvent can then be determined as: (A+B) - C.
More on percentage by mass can be found here: brainly.com/question/16885872
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