I say it’s 9 moles , hope this is right
0.0024 g of Ba(NO₃)₂
Explanation:
First we need to determine the molecular weight of barium nitrate Ba(NO₃)₂
molecular wight of Ba(NO₃)₂ = molecular weight of Ba × number of Ba atoms + molecular weight of N × number of N atoms + molecular weight of O × number of O atoms
molecular wight of Ba(NO₃)₂ = 137 × 1 + 14 × 2 + 16 × 6 = 261 g/mol
number of moles = mass / molecular weight
mass = number of moles × molecular weight
mass of Ba(NO₃)₂ = 0.625 / 261 = 0.0024 g
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Explanation:
Bohr's model of the hydrogen atom is based on three postulates: (1) an electron moves around the nucleus in a circular orbit, (2) an electron's angular momentum in the orbit is quantized, and (3) the change in an electron's energy
Ring of fire happens mostly as a result of plate tectonics.
Now if water is ever channeled out of the pacific ocean, we would have a number of deep ocean trenches. These trenches are side by side with volcanic arcs that are forward on the path of the ring of fire.
These volcanic arc is ring of fire and it surrounds the tectonic plate. The volcanic arc is what produces islands and mountain ranges.
In conclusion, ring of fire are due to plate tectonics, Arcs along the ring of fire after water is drained from the pacific forms mountain ranges.
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