Question

Answer 1

Câu 1:

\(a,m_{H_2SO_4}=0,15.98=14,7(g)\\ b,V_{H_2}=0,25.22,4=5,6(l)\\ c,m_{N_2}=\dfrac{6,72}{22,4}.28=8,4(g)\\ d,n_{H_2SO_4}=\dfrac{19,6}{98}=0,2(mol)\\ e,V_{CO_2}=0,5.22,4=11,2(l)\\ f,m_{Ca(OH)_2}=0,3.74=22,2(g)\)

Câu 2:

\(BTKL:m_{KClO_3}=m_{KCl}+m_{O_2}\\ \Rightarrow m_{KCl}=24,5-9,6=14,9(g)\)

Câu 3:

\(1,4P+5O_2\xrightarrow{t^o}2P_2O_5\\ 2,4K+O_2\xrightarrow{t^o}2K_2O\\ 3,2Fe(OH)_3\xrightarrow{t^o}Fe_2O_3+3H_2O\\ 4,Zn+2HCl\to ZnCl_2+H_2\\ 5,Al_2O_3+6HNO_3\to 2Al(NO_3)_3+3H_2O\\ 6,CH_4+2O_2\xrightarrow{t^o}CO_2+2H_2O\\ 7,2Al+3H_2SO_4\to Al_2(SO_4)_3+3H_2\\ 8,Na+H_2O\to NaOH+\dfrac{1}{2}H_2\)