vil
Key Member
- Joined
- Sep 13, 2007
- Member Type
- Student or Learner
- Native Language
- Bulgarian
- Home Country
- Bulgaria
- Current Location
- Bulgaria
Dear teachers,
Would you be kind enough to tell me your opinion concerning the following sentences?
1.Hydrogen was substituted by oxygen.
2.Hydrogen was substituted for oxygen.
3.Considerable disagreement exists regarding the extent of substitution of chlorine for hydrogen in given alkalies.
Thank you for your efforts.
Regards,
V.
Would you be kind enough to tell me your opinion concerning the following sentences?
1.Hydrogen was substituted by oxygen.
2.Hydrogen was substituted for oxygen.
3.Considerable disagreement exists regarding the extent of substitution of chlorine for hydrogen in given alkalies.
Thank you for your efforts.
Regards,
V.