[16*26" miligram of sample of an eement "],[x" contains "166times10^(20)" cotems.rinct withe atemie "],[" mass of the element? "]

2.49 xx 10^(-18)g of an element X contains 2.0 xx 10^(4) atoms. What is the atomic mass of the element X ?

2.49 xx 10^-18 g of an element. A contains 2.0 xx 10^4 atoms. What is, the atomic mass of the element A?

30 g of element x contains 18.069 xx 10^(23) atoms of x. Calculate gram-molecular mass of x_(2)

The mass of a single atom of an element X is 2.65 xx 10^(-23) g . What is its atomic mass ? What could this element be ?

A sample of MgSO_(4) contains 8 xx 10^(20) 'O' atoms what is the mass of 'S' in the sample ?

A sample of MgSO_(4) contains 8 xx 10^(20) 'O' atoms what is the mass of 'S' in the sample ?

The mass of one atom of an element X is 2.0 xx 10^(-23) g . (i) Calculate the atomic mass of element X. (ii) What could element X be ?

A sample of an element X contains two isotopes ._(8)^(16)X and ._(8)^(18)X . If the average atomic mass of this sample of the element be 16.2 u, calculate the percentage of the two isotopes in this sample.