Answer:
26.9%
Explanation:
To obtain the percentage by mass of solution, do the following:
Data obtained from the question include:
Mass of HCl (solute) = 36g
Mass of water (solvent) = 98g
Mass of the solution = Mass of solute + Mass of solvent
Mass of the solution = 36 + 98 = 134g
Percentage by mass of the solution = Mass of solute/mass of solution x 100
Percentage by mass of solution = 36/134 x 100 = 26.9%
the force between the electron and the proton.
a) Use F = k * q1 * q2 / d²
where k = 8.99e9 N·m²/C²
and q1 = -1.602e-19 C (electron)
and q2 = 1.602e-19 C (proton)
and d = distance between point charges = 0.53e-10 m
The negative result indicates "attraction".
the radial acceleration of the electron.
b) Here, just use F = ma
where F was found above, and
m = mass of electron = 9.11e-31kg, if memory serves
a = radial acceleration
the speed of the electron.
c) Now use a = v² / r
where a was found above
and r was given
<span> the period of the circular motion.</span>
d) period T = 2π / ω = 2πr / v
where v was found above
and r was given
The pressure (in atm) in a 5 L tank with 37.50 grams of oxygen gas at 350 K is 6.715 atm.
<h3>How do we calculate the pressure of gas?</h3>
Pressure of gas will be calculated by using the ideal gas equation as:
PV = nRT, where
P = pressure = ?
V = volume = 5 L
R = universal gas constant = 0.082 L.atm / K.mol
T = temperature = 350 K
n is the moles of gas and it will be calculated as:
n = W/M, where
W = given mass = 37.50 g
M = molar mass of oxygen = 32g/mol
n = 37.50/32 = 1.17 mol
On putting all these values, we get
P = (1.17)(0.082)(350) / (5) = 6.715 atm
Hence resultant pressure of the oxygen gas is 6.715 atm.
To know more about ideal gas equation, visit the below link:
brainly.com/question/1056445
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Answer:
the answer is a because thermal energy is heat and the question said that is not a factor of thermal energy so A does not refer to heat