How many molecules of sodium oxide will be created if 275 grams of sodium reacts with excess oxygen?
given the equation: 4na + o2 -> 2na2o

Explanation:

To calculate the number of molecules of sodium oxide that will be created if 275 grams of sodium reacts with excess oxygen, use the chemical equation to calculate the number of moles and then multiply by Avogadro's number.

1) Balanced chemical equation (given):

2) Mole ratio:

3) Calculate the number of moles in 275 g  of Na:

4) Set a proportion to find the number of moles of product (Na₂O):

5) Convert the number of moles to number of molecules:

passing a magnet thought the

mixture , because iron gets attracted to magnet .