A metal oxide has the formula `X_2O_3`. It can be reduced by hydrogen to give free metal and water. `0.1596g` of metal oxide requires `6mg` of hydrogen for complete reduction. The atomic mass of the metal (in amu) is :

On heating 0.220 g of a metallic oxide in presence of hydrogen,0.045 g of water is formed. If the equivalent mass of the metal is E,then what is the value of E/9

1g mixture of equal number of mole of Li_2 Co_3 and other metal carbonate (M_2 CO_3) required 21.6 mL of 0.5 NHCI for complete neutralisation reaction. What is the approximate atomic mass of the other metal ?

Electrolysis can be used to determine atomic masses. A current of 0.550 A deposits 0.55g of a certain metal in 100 minutes. Calculate the atomic mass of the metal if eq. mass=mole. Mass/3

What is the emprical formula of vanadium oxide , if 2.74g of the metal oxide contains 1.53g of metal ?

A mixture of H_(2)SO_(4) and H_(2)C_(2)O_(4) (oxalic acid ) and some inert impurity weighing 3.185 g was dessolved in water and the solution made up to 1litre. 10 mL of this solution required 3 mL of 0.1 N NaOH for complete neutralization. In another experiment 100 mL of the same solution in hot condition required 4 mL of 0.02 M KMnO_(4) solution for complete reaction. The mass % of H_(2)SO_(4) in the mixture was:

Oleum is considered as a solution of SO_(3) in H_(2)SO_(4) , which is obtained by passing SO_(3) in solution of H_(2)SO_(4) When 100 g sample of oleum is diluted with desired mass of H_(2)O then the total mass of H_(2)SO_(4) obtained after dilution is known is known as % labelling in oleum. For example, a oleum bottle labelled as ' 019% H_(2)SO_(4) ' means the 109 g total mass of pure H_(2)SO_(4) will be formed when 100 g of oleum is diluted by 9 g of H_(2)O which combines with all the free SO_(3) present in oleum to form H_(2)SO_(4) as SO_(3)+H_(2)O to H_(2)SO_(4) 1 g of oleum sample is diluted with water. The solution required 54 mL of 0.4 N NaOH for complete neutralization. The % free SO_(3) in the sample is :

Calculate the current (in mA) required to deposite 0.195g of platinum metal in 5.0 hours from a solution of [PtCl_6^(2-) :(Atomic mass:Pt=195)

The standard reduction potential of three metallic cations X, Y and Z are +0.52 , -3.03 and -1.18 v respectively. The order of reducing power is:

32g of a sample of FeSO_(4) .7H_(2)O were dissolved in dilute sulphuric aid and water and its volue was made up to 1litre. 25mL of this solution required 20mL of 0.02 M KMnO_(4) solution for complete oxidation. Calculate the mass% of FeSO_(4) .7 H_(2)O in the sample.

6.2g of a sample containing Na_2CO_3, NaHCO_3 and non-volatile inert impurity on gentle heating loses 5% of its mass due to reaction 2NaHCO_3 rarr Na_2 CO_3 + H_2 O + CO_2 . Residue is dissolved in water and formed 100mL solution and its 10mL portion requires 7.5 mL of 0.2M aqueous solution of BaCI_2 for complete precipitation of carbonates. Determine mass (in gram) of Na_2 CO_3 in the original sample.