Determine the molecular formula of an oxide of iron in which the mass per cent of iron and oxygen are 69.9 and 30.1 respectively .Given that the molecular mass of iron oxide is 159.8 and atomic masses `Fe = 55.85 amu and O = 16.00 amu.`

Determine the empirical formula of an oxide in which mass percent of iron and oxygen are 69.9 and 30.1 respectively.

The mass percentage of iron present as Fe(III) in Fe_(0.93)O_(1.0) is

A compound used in making nylon, contains 43.8% oxygen. There are four oxygen atoms per molecule. What is the molecular mass of compound ?

STATEMENT-1: Gram molecular mass of O_(2) is 32. STATEMENT-2: Relative atomic mass of oxygen is 32 a.m.u.

Calculate the binding energy per nucleon of _8O^(16) nucleus .Given that mass of _8O^(16) nucleus = 15.994914 a.m.u. mass of proton = 1.007825 a.m.u,mass of neutron = 1.008665 a.m.u. and 1.am.m.u= 931.5 MeV

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 strongs heating, One gram of the silver salt of an organic dibasic acid yields 0.5934 g of silver. If the mass percentage of carbon in it 8 times the mass percentage of hydrogen and one - half the mass percentage of oxygen, determine the molecular formula of the acid.

Which has more number of atoms, 100 gram of sodium or 100 gram of iron ( given atomic mass of Na= 23 u, Fe=56u)?