C12 is to 642 and stop will be a28 so 642+a28=1879ab
The answer is D: A metal is added to an acid and hydrogen gas is formed, because that's a chemical reaction
Answer:
16.52 lb NaCl will be in the tank at the end of 3 hours.
Explanation:
Let s(t) = gal of NaCl in a container at time t (in minutes).
s'(t) = The rate at which the amount of gal of NaCl in the container is changing.
s'(t) = Rate of NaCl going in - Rate of NaCl going out
By variable separable method we get
Integrate both sides.
100 Ib of NaCl are initially dissolved in 600 gal of a NaCl solution in a container. it means s(0)=100.
Therefore the required function is
.... (1)
We need to find the amount of NaCl will be in the tank at the end of 3 hours.
3 hours = 180 minutes.
Substitute t=180 in equation (1).
Therefore, 16.52 lb NaCl will be in the tank at the end of 3 hours.
Answer:
Water contains two parts of hydrogen and one part oxygen. Therefore, during the electrolysis of water the amount of hydrogen has collected in one of the test tubes is double than that of the oxygen produced and collected in the other last tube.
The answer is A, Mars and Jupiter.