Answer:
t = 1862 s
Explanation:
To do this, we need first to determine the theorical detention time, which can be determined with the following expression:
t₀ = ∀/Q (1)
Where:
t₀: detention time
∀: Volume of the fluid in the reactor
Q: Flow rate in the reactor
With this time, we must use the following expression to determine the time that the workers will take to vent the tank:
C = C₀ e^(-t/t₀) (2)
From here, we must solve for time t, and the expression will be:
t = ln(C₀/C) * t₀ (3)
Now that we know the expression to use, let's solve for t. Using (1) to determine the detention time, ∀ is 1900 m³, and Q is 2.35 m³/s so:
t₀ = 1900 / 2.35 = 808.51 s
Now, let's solve for the time t. C will be 0.0015 mg/L (or 1.5 mg/m³ cause in 1 m³ we have 1000 L) and C₀ 15 mg/m³:
t = ln(15/1.5) * 808.51
<h2>
t = 1861.66 s or simply 1862 s</h2><h2>
</h2>
Hope this helps
Answer:
endothermic change occurs
Explanation:
photosynthesis, is an endothermic reaction in which energy is absorbed from the surrounding.
hope this helps
Answer:
Explanation:
To find the number of moles of each element present in 1 mole of Be(OH)₂, we use the ratio of the molar masses of the elements to the compound and multiply by the given mole.
Molar mass of Be(OH)₂ = 9 + 2(16+1) = 43g/mol
number of moles of Be = 
x 1 = 0.209mole
number of moles of O = 
x 1 = 0.744mole
number of moles of H = 
x 1 = 0.047mole
Answer:
2408.1 °C
Explanation:
Given data:
Mass of oxygen = 1.70 g
Volume occupy = 9.75 L
Pressure of gas = 799 torr (799/760 = 1.1 atm)
Temperature = ?
Solution:
Formula:
PV = nRT
First of all we will determine the number of moles of oxygen.
Number of moles = mass/ molar mass
Number of moles = 1.70 g/ 32 g/mol
Number of moles = 0.05 mol
Now we will put the values.
R = general gas constant = 0.0821 atm.L/ mol.K
T = PV/nR
T = 1.1 atm× 9.75 L /0.05 mol ×0.0821 atm.L/ mol.K
T = 10.725 /0.004
T = 2681.25 K
kelvin to °C
2681.25 K - 273.15 = 2408.1 °C
