FeS known as iron sulphide is formed by the following reaction:
Fe + S ................><span> FeS
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Iron sulphide has a molar mass of 87.910 grams. It has a grey color and can either be in the form of a powder of in the form of lumps.
It is insoluble in water and it reacts with acids.
Its density is 4.84 g/cm^3 and it has a melting point of 1194 degrees celcius.
Answer:tetrahedral
Explanation:
According to Valence Shell Electron Pair Repulsion Theory (VSEPR). The number of electron pairs on the valence shell of the central atom in a molecule influences the shape of that molecule. Four electron pairs around the central atom of a molecule leads to a tetrahedral geometry as predicted by VSEPR.
Answer:
The time taken for the reaction to go to completion(time taken for the cross to disappear) decreases steadily down the column for time.
Explanation:
If we look at the table closely we would quickly observe the following;
1) the volume of HCl was held constant
2) the volume of sodium thiosulphate was increased steadily
3) the volume of water was decreased steadily
The increase in volume of thiosulphate and decrease in the volume of water meant that reactant concentration was increased steadily. From our knowledge of factors that affect the rate of reaction, we know that the rate of reaction (typically read off as time taken for a given reaction to go to completion, in this case, decrease in the time taken for the cross to disappear) increases with increase in concentration of reactants.
Hence it is expected that as the concentration of reactants increase, the rate of reaction increases. As the rate of reaction increases, the time taken for the cross to disappear decreases. Hence the answer above.
The chemical name begins with Hydro The Chemical name ends with hydroxide and the ide ending is changed to ic also the polyatomic ate ending changed to ic