Question

Calculati masa moleculara, raport de masa pentru substantele....
H2O; NH3; CaO; NaCe;Hl2O3; Al2S3;CH4; MgO
AJUTATIMA PLSSS

Answer 1

MH2O = 2AH+AO = 2×1+16 = 18g/mol

raport de masa => H:O = 2:16 = 1:8

MNH3 = AN + 3AH = 14+3×1 = 17g/mol

raport de masa => N:H = 14:3

MCaO = ACa + AO = 40+16 = 56g/mol

raport de masa => Ca:O = 40:16 = 5:2

MNaCl = 58,5g/mol

raport de masa => Na:Cl = 23:35,5

....


MAl2S3 = 2AAl + 3AS = 2×27+3×32 = 150g/mol

raport de masa => Al:S = 54:96 = 9:16

MCH4 = 16g/mol

raport de masa => C:H = 12:4 = 3:1

MMgO = 40g/mol

raport de masa => Mg:O = 24:16 = 3:2

Answer 2

Rezolvarea o ai in fotografie !