tính khối lượng chất tham gia hoặc sản phẩm theo định luật bào toàn khối lượng 1 đốt cháy m (gam) Cacbon C thì cần 16 gam khí Oxi O2 và thu được 22 gam khí Cacbonic CO2 a lập phương trình hóa học của phản ứng b tính m 2 đốt 3,2 gam lưu huỳnh S trong không khí, thu được 6,4 gam lưu huỳnh đioxit SO2 a lập phương trình hóa học của phản ứng b tính khối lượng của Oxi đã tham gia trong phản ứng trên

2 câu trả lời

1)

Phản ứng xảy ra:

\(C + {O_2}\xrightarrow{{{t^o}}}C{O_2}\)

Áp dụng định luật bảo toàn khối lượng:

\({m_C} + {m_{{O_2}}} = {m_{C{O_2}}} \to m + 16 = 22 \to m = 6{\text{ gam}}\)

2)

Phản ứng xảy ra:

\(S + {O_2}\xrightarrow{{{t^o}}}S{O_2}\)

Áp dụng định luật bảo toàn khối lượng:

\({m_S} + {m_{{O_2}}} = {m_{S{O_2}}}\)

\( \to 3,2 + {m_{{O_2}}} = 6,4 \to {m_{{O_2}}} = 3,2{\text{ gam}}\)

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