Hi! For the first question: this isn’t true. It can’t be done. Animals can’t evolve from other animals.
The answer would be: K
Kalium or Potassium is one of the metal that located in the first column of the periodic table. It was a strong base with one valence. If react with water it would have an equation:
2K + 2H2O = 2KOH + H2
The kalium hydroxide will form ion if put on the aqueous state. It will become K+ and OH-, thus increasing the water pH.
The scientific question is “what is the growth rate of the fingerlings in 5% and 10% saline solutions?”
the other is a hypothesis
When methane gas, CH4, burns completely in oxygen, the reaction produces carbon dioxide and water, as seen in the equation. CH4+2 O2 CO2 + 2 H20.
Answer:
The correct answer is 5.30 * 10^-4 mol per L.
Explanation:
Based on Henry's law, in a solution solubility of the gas is directly proportional to the pressure, that is, C is directly proportional to P. Here P is the pressure and C is the concentration of the dissolved gases.
Therefore, it can be written as,
C2/C1 = P2/P1
Here, C1 is 6.8 * 10^-4 mol/L, P1 is 1 atm and P2 is 0.78 atm, then the value of C2 obtained by putting the values in the equation,
C2/(6.8*10^-4) = 0.78/1
C2 = 0.78 * 6.8*10^-4
C2 = 5.30 * 10^-4 mol per L.
Hence, the concentration of dissolved nitrogen at 0.78 atm is 5.30*10^-4 mol/L.
