Đốt cháy hết 16gam sulfur S trong không khí thu được 32 gam hợp chất sulfur dioxide SO2.biết rằng sulfur cháy là do xảy ra phản ứng của sulfur với khí oxygen trong không khí A)viết pthh của phản ứng B)lập biểu thức về khối lượng của phản ứng trên C)tính khối lượng khí oxygen cần dùng cho phản ứng trên D. Tính số mol và thể tích của khí oxygen đã phản ứng ở đkc(24,79)

2 câu trả lời

$a,PTHH:S+O_2\xrightarrow{t^o}SO_2$

$b,$ Áp dụng định luật BTKL:

$m_S+m_{O_2}=m_{SO_2}$

$c,m_{O_2}=m_{SO_2}-m_S=32-16=16(g)$

 $d,n_{O_2}=\dfrac{m}{M}=\dfrac{16}{32}=0,5(mol)$

$V_{O_2(đkc)}=0,5.24,79=12,395(lít)$

   `flower`

Đáp án + Giải thích các bước giải:

PTHH : `S+O_2→^{t^o}SO_2`

ĐLBTKL : `m_{S}+m_{O_2}=m_{SO_2}`

`tom_{O_2}=32-16=16(g)`

`n_{O_2}=16/32=0,5(mol)`

`V_{O_2}=0,5×24,79=12,395(l)`

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