Solution:
Mass of 1 mole of Na 2 SO 4 .10H 2 O = (23 x 2) + (32 x 1) + (16 x 4) + 10 (1 x 2 + 16) or, combining the oxygen atoms = 46 + 32 + 64 + 20 + 160 = 322 ..
Mass of 1 mole of Na 2 SO 4 .10H 2 O = (23 x 2) + (32 x 1) + (16 x 4) + 10 (1 x 2 + 16) or, combining the oxygen atoms = 46 + 32 + 64 + 20 + 160 = 322 ..Solution:
Mass of 1 mole of CaSO 4 = 40 + 32 + (16 x 4) =40 + 32 + 64 = 136 ..
Mass of 1 mole of CaSO 4 = 40 + 32 + (16 x 4) =40 + 32 + 64 = 136 ..Setting of cement
Cement absorbs water on mixing to form a gelatinous mass. This sets to a hard mass and is very resistant to pressure. This process is called the setting of cement. This simple looking process involves a complicated set of reactions of hydration and hydrolysis, leading to the formation of Si-O-Si, ..
..Solution:
The given problem is solved in the following table. Empirical formula = H 1 C 1 O 2 = HCO ..
The given problem is solved in the following table. Empirical formula = H 1 C 1 O 2 = HCO ..Reaction
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..For Example:
Aluminothermy is also used for welding broken iron rails...
Aluminothermy is also used for welding broken iron rails...
..Oxalic acid
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