Answer:
Thus, the pollutant concentration in lake will be reduced to 0.2% after 6.931471 days
Explanation:
From the information given:
A(t) = amount of pollutant for time (t)
A 4 billion cubic ft is the same as 4000 million cubic ft:
∴
The Initial amount of pollutant is
However;
the pollutant rate (input) = 400 × 0 = 0
the pollutant rate (output) =
The net rate =
A(0) = 16
A(t) = 8
<span>13.7 g
The balanced formula is:
Pb(ClO3)2(aq)+2NaI(aq) ==> PbI2(s) + 2NaClO3(aq)
The number of moles of NaI we have is the volume of fluid multiplied by the molarity so
0.350 * 0.170 = 0.0595 moles
Since the NaI is the limiting reactant, for every two moles used, we'll produce 1 mole of precipitate. So
0.0595 mole / 2 = 0.02975 mole
Now we need to calculate the molar mass of PbI2. Looking up the atomic weights
Atomic weight Lead = 207.2
Atomic weight iodine = 126.90447
Molar mass PbI2 = 207.2 + 2 * 126.90447 = 461.00894 g/mol
Now multiply the molar mass by the number of moles we have.
461.00894 g/mol * 0.02975 mol = 13.71501597 g
Rounded to 3 significant figures, the answer is 13.7 g</span>
Answer:
Because it takes tremendous effort to break free from the laws of gravity to exit the Earth's atmosphere
Explanation:
Explanation:
Pyruvate cannot be a final electron acceptor in bacterial aerobic or anaerobic respiration except Fe3+,rather, pyruvate is an electron donor. Whereas Sulfur is the electron acceptor in anaerobic respiration(respiration in absence of oxygen). Hydrogen ions, Fe3+ and oxygen are final electron acceptor in aerobic respiration.( Respiration in presence of oxygen).
It will react by being a chemical change because something new is formed