Question

Ajutor...............

Answer 1

Răspuns:

a)

2Mg + O2=> 2 MgO

2 Ba + O2 => 2 BaO

b) MMg=24g/mol

MMgO=24+16=40g/mol

MBa =137g/mol

MBaO =137+16=153g/mol

mMg=1×24=g

mBa=1×137=137g

2×24g 2×40g

2Mg + O2=> 2 MgO

24g xg

x=24×2×40/2×24=40gMgO

2×137g 2×153g

2 Ba + O2 => 2 BaO

137g yg

y=137×2×153/2×137=153g BaO