\(1,PTHH:CaCO_3\underrightarrow{t^o}CaO+CO_2\)

\(áp,dụng.dlbtkl,ta.có:\)

\(m_{CaCO_3}=m_{CaO}+m_{CO_2}\\ m_{CO_2}=m_{CaCO_3}-m_{CaO}=5-2,8=2,2\left(g\right)\)

\(2,a,pthh:4P+5O_2\underrightarrow{t^o}P_2O_5\)

\(n_P=\dfrac{m}{M}=\dfrac{12.4}{31}=0,4\left(mol\right)\)

\(b,theo.pthh\Rightarrow n_{O_2}=\dfrac{5}{4}n_P=\dfrac{5}{4}.0,4=0,5\left(mol\right)\\ \Rightarrow V_{O_2}=n.22,4=0,5.22,4=11,2\left(l\right)\\ m_{O_2}=n.M=0,5.32=16\left(g\right)\)

1. Áp dụng ĐLBTKL, ta có:

\(m_{CaCO_3}=m_{CaO}+m_{CO_2}\)

\(\Leftrightarrow5=2,8+m_{CO_2}\)

\(\Leftrightarrow m_{CO_2}=5-2,8=2,2\left(g\right)\)

2. Ta có: \(n_P=\dfrac{12,4}{31}=0,4\left(mol\right)\)

a. \(PTHH:4P+5O_2\overset{t^o}{--->}2P_2O_5\)

b. Theo PT: \(n_{O_2}=\dfrac{5}{4}.n_P=\dfrac{5}{4}.0,4=0,5\left(mol\right)\)

Theo PT: \(n_{P_2O_5}=\dfrac{1}{2}.n_P=\dfrac{1}{2}.0,4=0,2\left(mol\right)\)

\(\Rightarrow\left\{{}\begin{matrix}V_{O_2}=0,5.22,4=11,2\left(lít\right)\\m_{P_2O_5}=0,2.142=28,4\left(g\right)\end{matrix}\right.\)

ấn F để cầu tôi trên 5 hóa

PTHH: \(Fe_3O_4+4CO\xrightarrow[]{t^o}3Fe+4CO_2\uparrow\)

            \(Fe+H_2SO_4\rightarrow FeSO_4+H_2\uparrow\)

             \(H_2+\dfrac{1}{2}O_2\xrightarrow[]{t^o}H_2O\)

Ta có: \(n_{Fe_3O_4}=\dfrac{23,2}{232}=0,1\left(mol\right)\) \(\Rightarrow n_{Fe}=0,3\left(mol\right)=n_{H_2SO_4}=n_{H_2}=n_{H_2O}\)

\(\Rightarrow\left\{{}\begin{matrix}V_{H_2}=0,3\cdot22,4=6,72\left(l\right)\\V_{ddH_2SO_4}=\dfrac{0,3}{0,5}=0,6\left(l\right)\\V_{H_2O}=\dfrac{0,3\cdot18}{D_{nước}}=5,4\left(ml\right)\end{matrix}\right.\)

*P/s: \(D_{nước}=1g/ml\) 

bn càn tôi giúp gì ko

\(PTHH:CaCO_3\rightarrow CaO+CO_2\)

- 100g/mol 56g/mol

- 50g ?

\(m_{CaO}=\frac{59.56}{100}=28\left(g\right)\)

\(m_{CaO_{tt}}=\frac{28.90\%}{100\%}=25,5\left(g\right)\)

ờ kìa

chán thế ko biết

a) C + O₂ --t^o--> CO₂

b) \(n_C=\dfrac{24}{12}=2\left(mol\right)\)

=> n_CO2 =2 (mol)

=> m_CO2 = 2.44 = 88(g)

c)

n_O2 = 2(mol)

=> V_O2 = 2.22,4 = 44,8 (l)

=> V_kk = 44,8.5=224(l)

a)

$C + O_2 \xrightarrow{t^o} CO_2$
b)

$n_{CO_2} = n_C = \dfrac{24}{12} = 2(mol)$
$m_{CO_2} = 2.44 = 88(gam)$
c)

$n_{O_2} = n_C = 2(mol)$
$V_{O_2} = 2.22,4 = 44,8(lít)$
$V_{không\ khí} =5 V_{O_2} = 44,8.5 = 224(lít)$

a: \(C+O_2\rightarrow CO_2\)

b: \(n_C=\dfrac{24}{12}=2\left(mol\right)\)

\(\Leftrightarrow n_{CO_2}=2\left(mol\right)\)

\(\Leftrightarrow m_{CO_2}=2\cdot44=88\left(g\right)\)

\(m_{Fe}=\dfrac{1,6}{160}=0,01\left(mol\right)\\ pthh:Fe_2O_3+3H_2\underrightarrow{t^o}2Fe+3H_2O\)  
          0,01        0,03     0,02 
=> \(V_{H_2}=0,03.22,4=0,672\left(l\right)\\ m_{Fe}=0,02.56=1,12\left(g\right)\)
          

\(n_{Fe_2O_3}=\dfrac{1,6}{160}=0,01\left(mol\right)\)

PTHH: Fe₂O₃ + 3H₂ --t^o--> 2Fe + 3H₂O

            0,01---->0,03------->0,02

\(\rightarrow\left\{{}\begin{matrix}a,V_{H_2}=0,03.22,4=0,672\left(l\right)\\b,m_{Fe}=0,02.56=1,12\left(g\right)\end{matrix}\right.\)

áp dụng ĐL BTKL, ta có:

\(m_{CaCO_3}=m_{CaO}+m_{CO_2}\)

\(\Rightarrow m_{CO_2}=m_{CaCO_3}-m_{CaO}=10-5,6=4,4\left(g\right)\)

vậy khối lượng khí cacbon dioxit thu được là \(4,4g\)