Calculate the following
Number of molecules in 43 g `NH_3`

Calculate the following Number of atoms in 7.46 g Li

Calculate the following Number of atoms in 32.0 g Br_2

Calculate the number of molecules present in one drop of H_(2) O whose mass is 0.01 g b. Calculate the number of molecules leaving the liquid suface per second, if the same drop of water evaporates in one hour.

Calculate the number of molecules in each of the following (a) 24 g of nitrogen (b) 8.0 g of H_(2)S .

Calculate the total number of electrons present in 3.2 g of oxygen gas.

Calculate the number of moles in (a) 10 g of Hydrogen molecules (b) 30 g of H_(2)O

Calculate the number of molecules of sulphur (S_(8)) present in 16 g of solid sulphur .

Calculate the number of moles in each of the following : a. 11 g of CO_(2) b. 3.01 xx 10^(22) molecules of CO_(2) c. 1.12 L of CO_(2) at STP