Kết quả tìm kiếm

1. A woman who told me you was busy answered the phone. 2.The bus, which I take to school every morning, is always crowded. 3.They are singing a song which I don't know. 4.A man who spoke to me was very helpful. 5.A midwife is a woman who assists other women in childbirth. 6.They are the...

a, Na2O + H2O -> 2NaOH b, \dpi{100} n_{Na2O} = \frac{15,5}{62} = 0,25 (mol) Theo ptpứ : \dpi{100} n_{NaOH} = 2.n_{Na2O}=0,5(mol) 2NaOH + H2SO4 -> Na2SO4 + 2H2O Theo ptpứ: \dpi{100} n_{H2SO4}=1/2.n_{NaOH}=0,25 (mol) \dpi{100} m_{H2SO4}=0,25.98=24,5(g) \dpi{100} m_{dd...

Use the given word to complete the second sentence so that it has a similar meaning to the first sentence.Do not change the form of the given word : 1.A new house is impossible - we can not afford it. (question) 2.They haven't got enough money, so they can't buy a new cooker. (short)