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Science > Chemistry > Solids, liquids & gases

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1. what were gutters and drain pipes, toy soldiers, motor bike windscreens, lemonade bottles, electrical plug sockets, furniture stuffing and dustbins made out of before plastics came into use and what were the advantages/disadvantages of the previous materials used? and what exaclty does the word 'plastic' mean? thanks alot!

2. How do thermosoftening plastics and thermosetting plastics each behave when heated? Has it got anything to do with the use made of the plastics and the molecular nature of the plastics?

3. In molarity is 1M the strongest solution or the weakest?

4. What is one of the new safety symbols that isnt Toxic, explosive, harmful, corrosive, irritant, oxid...

5. I haven't managed to grasp Diffusion yet. Could you explain it to me in simpler terms?

6. I haven't managed to grasp Diffusion yet. Could you explain it to me in simpler terms?

7. Hi, Why can we use iron to make saucepans but not magnesium? Also Calcium is found in our teeth but its not the element calcium which is part of our teeth. Why do we know this? Thanks

8. How does the kinetic theory of matter relate to osmosis?

9. How does the kinetic theory of matter relate to osmosis?

10. Give one use for barium sulphate.

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