Hence it has been cut into 4pieces
Answer:
Chemical element, metallic, symbol Mg, situated in group IIa in the periodic table, atomic number: 12, atomic weight: 24,312. ... Magnesium is known for a long time as the lighter structural metal in the industry, due to it's low weight and to it's capability of forming mechanically resistant alloys.
A) would be correct.
The moon is right next to Earth.
Earth orbits around the sun.
Our solar system is at the edge of the Milky Way. So the edge of the Milky Way would be nearer than the center.
Answer:
Both K+ and NO3- concentrations are halved
Explanation:
Since the reaction is
K₂Cr₂O₇ + Pb(NO₃)₂ 2K(NO₃) + <u>PbCr</u>₂<u>O</u>₇
knowing that K+ and NO3- are spectator ions, their concentration do not change due to reaction but it will change due to the mixing of volumes of the reactants since we are mixing volumes of different concentrations.
for K+ initially we have:
c K+ initial = 0.25 M
c K+ final = n/ V = C i * Vin / Vfinal = 0.25 M * 100 ml / 200 ml = 0.125 M
the 200 ml comes from mixing the 100 ml of Pb(NO₃)₂ and 100 ml of K₂Cr₂O₇ ( assuming that the volume of the precipitate is insignificant relative to the solution , it does not occlude a significant portion of the saturated solution and assuming that any volume contraction/expansion due to non ideal behaviour of the solution is negligible)
the same happens with NO3- ,therefore its concentration is also halved
Answer:
3.00
Explanation:
Since assuming oxygen as molecule so there are 6 atoms hence 3 molecules of oxygen hence 3 moles