Find the total number of iron atom present in 224 amu iron.

Haemoglobin contains 0.25% iron by weight of haemoglobin is 89600. Find the number of iron atoms present in one molecule of haemoglobin.

Calculate the number of hydrogen atoms present in 90 amu of ethane.

Number of iron atoms present in haemoglobin molecule is

Number of iron atoms present in haemoglobin molecule is

Number of iron atoms present in haemoglobin molecule is

A mineral of iron contains an oxide containing 72.36% iron by mass and has a density of 5.2 g/cc. its unit cell is cubic with edge length of 839 pm. What is the total number of atoms (ions) present in each unit cell ? (Fe -56, O-16)

A complex of iron contains 45.6% iron by mass. Calculate the number of iron atoms present in 15.0 g of this complex.

Haemoglobin contains 0.312% iron by weight. The molecular weight of haemoglobin in 89600 . Find the number of iron atoms per molecular of haemoglobin.

Find the total number of H, S and 'O' atoms in the following : 196 amu H_(2)SO_(4)