2. Atoms & Elements

In the complex ion [Fe(NH_3)_2Br_4]^{2-}, what is the oxidation state (charge) of the iron (Fe) atom? (Omit the + sign in your answer.)

How many grams of maltose (C12H22O11) are required to prepare 100 mL of a 15% w/v solution?

What mass (in mg) does 2.63 moles of nickel (Ni) have? (Atomic mass of Ni = 58.69 g/mol)

What is the mass, in grams, of 4.32 mol of GaI_3?

Which of the following is the correct molar mass of urea (NH2CONH2)?

What is the molar mass of sodium chloride (NaCl)?