Mấy ac giúp em với ạ, mai e ktra rùiiii 1. Tính thể tích ở đkc (1 bar, 25độ C) của 4,8 gam khí lưu huỳnh đioxit SO2 2. Tính khối lượng 4,958 lít khí cacbon đioxit CO2 (đktc)

2 câu trả lời

`1)` Số mol của `4,8 gam` `SO_2` là:

`n_{SO_2} = m/M = {4,8}/{64} = 0,075 (Mol)`

Thể tích ở Đkc của 4,8 gam `SO_2` :

`V_{SO_2} = n.24,79 = 0,075.24,79 = 1,85925 (Lít)`

`2)` Số mol của 4,958 khí `CO_2` ở đktc là:

`n_{CO_2} = V/{22,4} = {4,958}/{22,4} ~~ 0,22 (Mol)`

Khối lượng của 4,958 lít khí  `CO_2` (đktc):

`m_{CO_2} = n.M = 0,22.44 = 9,68 (Lít)`

 

Đáp án:

 

Giải thích các bước giải:

 1) `n_{SO_2}` = $\frac{m_{SO_2}}{M_{SO_2}}$ = $\frac{4,8}{64}$ = 0,075mol 

`V_{SO_2}` = `n_{SO_2}` . 24,79 = 0,075 . 24,79 = 1,85925 `l`

2) b là đktc hay đkc v bn

`n_{CO_2}` = $\frac{V_{CO_2}}{24,79}$ = 0,2 mol 

`m_{CO_2}` = `n_{CO_2}` .`M_{CO_2}` = 0,2 . 44 = 8,8g

Bạn xem ý b là đktc hay đkc #aura

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