Question

某鋼樣1.1 g在純氧中完全燃燒，得到0.013 g二氧化碳，求此鋼樣中碳的質(zhì)量分?jǐn)?shù)．

Answer 1

0.013g CO₂中C元素質(zhì)量=0.013 g×

12

44

×100%≈0.0035g
此鋼樣中碳的質(zhì)量分?jǐn)?shù)=

0.0035g

1.1g

×100%≈0.3%
答：此鋼樣中碳的質(zhì)量分?jǐn)?shù)約為0.3%．