According to the second-order rate constant formula:
K t = 1/[At] - 1/[Ao]
when k is the rate constant = 0.035 (given missing in your question)
and t is the time = 190 sec
Ao is the initial concentration of X = 0.35 m
by substitution:
0.035 * 190 sec = 1/[At] - 1/0.35
∴ [At] = 0.11 m
∴ the concentration after 190 sec = 0.11 m
Answer:
I really don't know but I guess
Explanation:
2.7 would be the answer or 2.70
(1) False, lots of energy is actually produced from nuclear fuel, if we didn't get much then we probably wouldn't use it
(2) False, its burning coal that contributes to acid rain, since it contains sulfur
(3) False again, we can control the reaction with aptly named control rods, which are typically made of boron, to absorb some of the neutrons flying around in the chain reaction
(4) True, radioactive waste is very difficult to dispose of, and is also very dangerous. Sources of radiation can remain so for millions of years
Molecular weights:
CaCl2 = 40 + 35.5*2 = 111 g/mol
Ca3(PO4)2 = 40*3 + (31+16*4)*2 = 310 g/mol
89.3 g CaCl2 = 89.3/111 = 0.8045 mol CaCl2
Balanced equation:
3CaCl2 + 2Na3PO4 --------> 6NaCl + Ca3(PO4)2
3 moles CaCl2 produce 1 mol Ca3(PO4)2
Therefore 0.8045 mol CaCl2 produces 1/3 * 0.8045
= 0.2682 mol Ca3(PO4)2
= 0.2682 mol * 310 g/mol
= 83.1 g Ca3(PO4)2
Ans: 83.1 g
Answer:
X
anode
electrons in the wire flow away
anions from salt bridge flow toward
loses mass
Y
cathode
electrons in the wire flow toward
cations from salt bridge flow toward
gains mass
Explanation:
In a galvanic cell, oxidation occurs at the anode while reduction occurs at the cathode. The metal that is more reactive functions as the anode while the less reactive metal functions as the cathode.
Electrons leave the anode and travel via a wire to the cathode. At the anode cations give up electrons and enter into the solution.
At the cathode, cations pick up electrons and are deposited on the cathode leading to a gain in mass at the cathode.
Positive ions from the salt bridge flow towards the cathode while negative ions from the salt bridge flow towards the anode.