Question

Calculati maasa moleculara pentru:

oxid de aluminiu
trioxid de sulf
hidroxid de sodiu
hidroxid de calciu
acid carbonic
acid fosforic
azotat de argint
clorura de sodiu

Answer 1

M AlO2 = 17 + 2.16 pentru ca sunt 2 atomi de oxigen = 17+32=49 g/mol
M SO3 = 32+ 3.16 = 32+48 = 80 g/mol
M NaOH = 23+16+1=40 g/mol
M Ca(OH)2 =40+2.16+2.1 = 40+32+2=74 g /mol
M H2CO3 =2.1 + 12 +3.16 = 2 + 12 +48= 62 g / mol
M H2SO4=2.1 + 32 + 4.16= 2+32+64=98 g / mol
M AgNO3= 108+14+3.16 =108+14+48=170 g/mol
M NaCl = 23+35,5 = 38,5 g/mol