One atom of an element X weighs 6.644 xx 10^(-23) g. Calculate the number of gram-atoms in 40 kg of it.

One atom of an element X weighs 6.644 xx 10^(-23) g. Calculate the num

1.	One atom of an element X weighs 6.644 xx 10^(-23) g. Calculate the number of gram-atoms in 40 kg of it.
Answer» SOLUTION :Wt. of 1 mole of atoms of X = wt. of 1 atom x Av. const. `=6.44 xx 10^(-23) xx 6.022 xx 10^(23)` = 40 G Thus, the at. Wt. Of X=40 No. Of moles (or gram-atoms) of X `=("WEIGHT in g")/("at. Wt")` `=(40 xx 1000)/40 = 1000`