2007-10-26 05:56:27 · 3 answers · asked by nett 1 in Science & Mathematics ➔ Chemistry
how many grams of h2o are needed to produce 150g of mg(OH)2?
when 2.00 moles of h2o react how many grams ofNH3 are produced?
2007-10-26 06:32:36 · update #1
Mg3N2 + 6H2O → 3Mg(OH)2 + 2NH3
why - it's already balanced - and look at:
ref: http://en.wikipedia.org/wiki/Magnesium_nitride
2007-10-26 06:03:50 · answer #1 · answered by Dr Dave P 7 · 0⤊ 0⤋
Atomic weights: Mg=24 O=16 H=1 Mg(OH)2=58 H2O=18 N=14 NH3=17
150mgMg(OH)2 x 1mmolMg(OH)2/58mgMg(OH)2 x 6mmolH2O/3mmolMg(OH)2 x 18mgH2O/1mmolH2O = 93.1 mg H2O to three sig figs.
2molH2O x 2molNH3/6molH2O x 17gNH3/1molNH3 = 11.3g NH3 to three sig figs.
2007-10-26 14:10:48 · answer #2 · answered by steve_geo1 7 · 1⤊ 0⤋
Mg3N2 + 6H2O---3Mg(OH)2+ 2NH3
That is a balanced equation...
2007-10-26 13:01:42 · answer #3 · answered by sayamiam 6 · 0⤊ 0⤋