Question

Afla masa atomica relativa a) sarea de bucatarie NaCl b) soda alimentara NaHCO3 c)otetul CH3COOH d) alcoolul alimentar C2H5OH e) glucoza C6H12O6 f) zaharul C12H22O11 g) iodul I2 h) creta CaCO3 i) varul stins Ca(OH)2

Answer 1

a) M(NaCl) = 23+35,5= 58,5 g/mol
b)M(NaHCO3) = 23+1+12+(3×16)= 36+48= 84
g/mol
c)M(CH3COOH)=12+3×1+12+16+16+1=70 g/mol
d)M(C2H2OH)=2×12+2×1+16+1=43 g/mol
e)M(C6H12O6)=(6×12)+(12×1)+(6×16)=180 g/mol
f)M(C12H22O11)=(12×12)+(22×1)+(11×16)=342
g/mol
h)M(CaCO3)= 40+12+(3×16)=100 g/mol
i)M(Ca(OH)2)= 40+(2×16)+(2×1)=74 g/mol
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