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1. Who was Mendeleev?

2. Who was Mendeleev?

3. Which fuel is cleaner Ethanol or Butanol

4. Please could you tell me the history of the atom?

5. 70% of metal is used once, then thrown away. How does recycling it save metal and energy?

6. I am doing my science coursework and it is about rates of reaction with sodiam thiosulphate and hydrochloric acid. In the predictin with have to talk about the "Collision Theory" and "Activation Energy" but I am not sure what they are. My teacher sort of explained it but I was not to sure what she meant. Could you explain it a bit better please?

7. I am doing my science coursework and it is about rates of reaction with sodiam thiosulphate and hydrochloric acid. In the predictin with have to talk about the "Collision Theory" and "Activation Energy" but I am not sure what they are. My teacher sort of explained it but I was not to sure what she meant. Could you explain it a bit better please?

8. We are doing how you can speed up the rates of reactions. My chosen variable was concentration and I used light gates and sodium thiosulphate and hydrochloric acid increasing the molar of the acid. Now I have to write up the results and conclusion and I'm panicking. What do I have to include? I am expected to get a level 6, 7 or 8 and its got to be done in 2 days. Help!

9. We are doing how you can speed up the rates of reactions. My chosen variable was concentration and I used light gates and sodium thiosulphate and hydrochloric acid increasing the molar of the acid. Now I have to write up the results and conclusion and I'm panicking. What do I have to include? I am expected to get a level 6, 7 or 8 and its got to be done in 2 days. Help!

10. We are doing how you can speed up the rates of reactions. My chosen variable was concentration and I used light gates and sodium thiosulphate and hydrochloric acid increasing the molar of the acid. Now I have to write up the results and conclusion and I'm panicking. What do I have to include? I am expected to get a level 6, 7 or 8 and its got to be done in 2 days. Help!

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