Calcualte the mass (in grams) of each of the following species.
a. Na atom b. S atom c. `CH_3Cl` molecule d. `Na_2 SO_3` formula unit

Calculate the mass of the following a. One atom of calcium b. One molecules of SO_(2)

Calculate number of atoms in each of the following" i. 0.5 mol atom of nitorgen ii. 0.2 mol molecules of hydrogen iii. 3.2 g of sulphur Calculate number of molecules in each of the following: i. 14 g of nitrogen ii. 3.4 g of H_(2) S

Calculate the mass of 3.5 gram atom of calcium. Atomic mass of calcium is 40

Calculate the formula weight of each of the following to three significant figures, using a table of atomic weight (AW): (a) chloroform CHCl_3 (b) Iron (III) sulfate , Fe_2(SO_4)_3 .

Calculate the molar mass of the following substances : (a) Ethyne, CH_(2) (b) Sulphur molecule, S_(8) (c) Nitric acid HNO_(3) (d) , Hydrochloric acid, HCl

Calculate the molar mass of the following substances : (a) Ethyne, CH_(2) (b) Sulphur molecule, S_(8) (c) Phosphorus molecule, C_(4) (atomic mass of Phosphorus = 31) (d) Nitric acid, HNO_(3) Hydrochloric acid, HCl

Objective question (only one correct). I. Which of the following has least mass? a. 1 mol of S b. 3 xx 10^(23) atom of C c. 2 g atom of nitrogen d. 7.0 g of Ag ii. The simplest formula of a compound containing 50% of element A (atomic mass 10) and 50% of element B (atomic mass 20) is: a. AB b. A_(2) B c. A_(2) B_(3) d. AB_(3)

Name a species that will be isoelectronic with each of the following atoms or ions: Cl-

Determine the oxidation number of O in the following: Na_2O_2 and CH_3COOH