How many grams of sodium oxide can be produced when 55.3 g Na react with 64.3 g O2?

Unbalanced equation: Na + O2 → Na2O

Show, or explain, all of your work along with the final answer.

Question

How many grams of sodium oxide can be produced when 55.3 g Na react with 64.3 g O2?

Unbalanced equation: Na + O2 → Na2O

Show, or explain, all of your work along with the final answer.

anonymous · Answer

Balanced equation: 4Na + O2 --> 2Na2O

Moles: Na=22.99g/mol                                 O2 =32g/mol

$$55.3gNa *mol/22.99g *2Na_2O/4Na *61.98g/mol=74.5g Na_2O$$  Now to look at the other side

$$64.3gO_2 *mol/32.0g *2Na_2O/O_2 *61.98g/mol = 249.0g Na_2O$$

This tells me that the most realistic expectation will be:74.5g NA_2O

anonymous · Answer

Thank you very much!

anonymous · Answer

useful shortcut is, balance the reaction, and coefficient * molecular weight / given weight is constant for any reactant and product in a balanced reaction..this technique is very helpful for stoicometric problems

anonymous · Answer

since here sodium is  limiting reagent...by my technique, 4*molecular wt of na / weight of na  = 2 * molecular weight of na20/its weight, answer comes as 74.5