1) The molar amount of compound present in 44.56g of iron (II) oxide is

______ mol. (make sure to round your answer to the correct number of significant digits. If you use a number less than 1, make sure to put a 0 in front of the decimal. Do NOT use scientific notation).

2) The molar amount of compound present in 450g of sulfuric acid is

_______mol. (make sure to round your answer to the correct number of significant digits. If you use a number less than 1, make sure to put a 0 in front of the decimal. Do NOT use scientific notation).

3) The mass of 0.0258mol of sodium sulfite is

________ g. (make sure to state your answer to the correct number of significant digits. If your answer is less than 1, make sure to put a 0 in front of the decimal. Do NOT use scientific notation.)

4) The mass of 10.0mol of oxygen gas is

_______ g. (make sure to state your answer to the correct number of significant digits. If your answer is less than 1, make sure to put a 0 in front of the decimal. Do NOT use scientific notation.)