fgcbv f ccvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv

\(Muối:ACO_3,B_2CO_3\\ ACO_3+2HCl\rightarrow ACl_2+CO_2+H_2O\\ B_2CO_3+2HCl\rightarrow2BCl+CO_2+H_2O\\ n_{CO_2}=\dfrac{0,672}{22,4}=0,03\left(mol\right)\Rightarrow m_{CO_2}=44.0,03=1,32\left(g\right)\\ n_{CO_3^{2-}}=n_{CO_2}=0,03\left(mol\right);n_{Cl^-}=2.n_{CO_2}=0,03.2=0,06\left(mol\right)\\ m_{muối.ddX}=m_{muối.cacbonat}+m_{Cl^-}-m_{CO_3^{2-}}=10+0,06.35,5-60.0,03=10,3\left(g\right)\)

nH2 = 1,456:22,4 = 0,065

n Cl- = n HCl = 2nH2 = 0,13

m= m kloai + m cl- = 6,225 gam chọn B

\(n_{H_2}=\dfrac{1,456}{22,4}=0,065mol\\ BTNT\left(H\right):n_{HCl}=2n_{H_2}\\ \Leftrightarrow n_{HCl}=2.0,065=0,13mol\\ BTKL:m_{kl}+m_{HCl}=m_{muối}+m_{khí}\\ \Leftrightarrow1,61+0,13.36,5=m_{muối}+0,065.44\\ \Leftrightarrow m_{muối}=3,495g\)

Ta có: \(n_{H_2}=0,04\left(mol\right)\Rightarrow n_Y=0,08\left(mol\right)\)

Mà: m_Y - m_H2 = 2,48 ⇒ m_Y = 2,56 (g)

\(\Rightarrow M_Y=\dfrac{2,56}{0,08}=32\left(g/mol\right)\)

→ Y là CH₃OH. 

\(\Rightarrow n_X=n_Y=0,08\left(mol\right)\)

Ta có: \(n_{H_2O}=\dfrac{3,96}{18}=0,22\left(mol\right)\)

m_X = m_C + m_H + m_O ⇒ m_C = 5,88 - 0,22.2 - 0,08.2.16 = 2,88 (g)

\(\Rightarrow n_{CO_2}=n_C=\dfrac{2,88}{12}=0,24\left(mol\right)\)

⇒ n _{este không no} = 0,24 - 0,22 = 0,02 (mol)

⇒ n _{este no} = 0,06 (mol)

Gọi: CTPT của este không no là C_nH_2n-2O₂ (n ≥ 5) và este no là C_mH_2mO₂ (m > 2)

BTNT C, có: 0,02n + 0,06m = 0,24

⇒ n + 3m = 12

Với n = 5, m = 7/3 là thỏa mãn.

→ C₅H₈O₂: 0,02 (mol)

\(\Rightarrow\%m_{C_5H_8O_2}=\dfrac{0,02.100}{5,88}.100\%\approx34,01\%\)

Ta có: \(n_{CO_2}=\dfrac{12,32}{22,4}=0,55\left(mol\right)\)

\(n_{H_2O}=\dfrac{18}{18}=1\left(mol\right)\)

⇒ n_alcol = n_H2O - n_CO2 = 0,45 (mol) = n_{O (alcol)}

Có: \(n_{NaOH}=0,45.1=0,45\left(mol\right)\)

BTNT O, có: n_{O (alcol)} + 2n_O2 = 2n_CO2 + n_H2O 

⇒ n_O2 = 0,825 (mol)

BTKL, có: m_Y + m_O2 = m_CO2 + m_H2O

⇒ m_Y = 15,8 (g)

BTKL, có: m_X + m_NaOH = m_alcol + m_Z 

⇒ m = m_X = 15,8 + 34,1 - 0,45.40 = 31,9 (g)

a, Có: \(M_X=40.10=400\left(g/mol\right)\)

\(\Rightarrow2M_M+96.3=400\Rightarrow M_M=56\left(g/mol\right)\)

→ M là Fe.

b, Ta có: \(\dfrac{2M_M}{2M_M+96.3}=0,1579\) \(\Rightarrow M_M=27\left(g/mol\right)\)

→ M là Al.

ngfngfha qbadkcjvwerertwer ư4bt h ưeascfgeq g ưhrewtherth3tr t6j etyk5wergqerg ẻgwergw ẻgerg8erg8uewrgwjberhg bbẻgihewrgweirgewrgwerogewr euo 9guergwerhuigher

gewrg\ewrg\ưerg\ưerger

gewr

g

ẻg

 ẻg

ư 

ẻg

 ửhwer hửherh

ẻ

e

rh

ử

hẻutj

 rthkm, uku

 jt7

ỵt4u 

6k7o

rrkjkt7

rkrj4

tug

jn5y

ụ46etyk

 ẹmt

rfdu

5j5jetrf

etet

gj

jjgge

jgetetge

jg

j