Question

calculeaza nr. de moli in 4,4 g ,in 440 g si on 44 kg. de dioxid de carbon CO²

Answer 1

nr moli = m/M =4,4/44=0.1 moli Co2
nr moli = m/M = 440/44 = 10 moli Co2
nr moli = m/M = 44/44=1 kmol Co2

Answer 2

$m_1=4,4 \ g \\ m_2=440 \ g \\ m_3=44 \ kg=44 \ 000 \ g \\ M_{CO_2}=12\cdot 1+16 \cdot 2=12+32=44 \ g/mol \\ \boxed{\nu_1-?} \ \ \ \boxed{\nu_2-?} \ \ \ \boxed{\nu_3-?} \\ \bold{Rezolvare:} \\ \boxed{\nu=\frac{m}{M}} \\ \nu_1=\frac{m_1}{M_{CO_2}}=\frac{4,4 \ g}{44 \ g/mol} \\ \Rightarrow \boxed{\nu_1=0,1 \ moli} \\ \nu_2=\frac{m_2}{M_{CO_2}}=\frac{440 \ g}{44 \ g/mol} \\ \Rightarrow \boxed{\nu_2=10 \ moli} \\ \nu_2=\frac{m_3}{M_{CO_2}}=\frac{44 \ 000 \ g}{44 \ g/mol}$
$\Rightarrow \boxed{\nu_3=1 \ 000 \ moli}$