Number of moles of FeCl2 used = mass/ molar mass
Number of moles = 507/126.751 = 4.
If one mole of Fe reacts with two moles of sodium
Then 4 moles of Fe produces 8 moles of sodium.
Number of moles of sodium = mass/molar mass
Molar mass of sodium chloride = 23 +35.5 = 58.5 g/mol
Hence mass = 8 * 58.5 = 468 g. Hence Option A.
Minerals determines the composition of a rock
Answer: NH3 and H2O
Explanation:
NH4OH(l) --> NH3(g) + H2O(g)
Ammonia liquor, NH4OH is an highly unstable hydroxide of ammonium, hence it decomposes on heating to produce ammonia gas, NH3 which is liberated to the surroundings and water, H2O evaporated as steam. In a reverse reaction, ammoniacal liquor is formed by dissolving gaseous ammonia in cold water.
Thus, the products of NH4OH break down are NH3 and H2O
Answer:
1. ions
2. ions
Explanation:
Metals lose electrons and form positive ions (because there are more protons+)
While non-metals gain electrons and form negative ions.(more electrons-)