When 1.5 grams of magnesium burns, how many grams of magnesium oxide will be formed?

a. write a balanced chemical equation for the above reaction.

b. show by unit conversion (show conversion factors, ie. 2 g h20 x 1 mole h2o/18 g h2o x x = answer?

The balanced chemical reaction for this would be written as:

2Mg + O2 = 2MgO

We use this reaction and the amount of the reactant given to calculate for the amount of magnesium oxide that is produced. We do as follows:

1.5 g Mg (1 mol / 24.31 g) ( 2 mol MgO / 2 mol Mg ) (40.30 g /1 mol ) = 2.49 g MgO produced

Cr(oh)3 -> cr(3+) + 3oh-