1. Do you have... ?
2. Where can I find... ?
3. I'm just browsing. (browsing = looking casually)
4. I'm looking for...
5. How much is this?
6. Is this on sale?
7. Can I try it on? (use this to ask if you can put on clothing to see if it's the right size)
8. I'll take it!
9. Do you take credit cards?
10. I'd like to return/exchange this.

Fact
If a substance is burned and all of the results of its burning (smoke, ash, soot and gas) are captured and weighed, they will be a little heavier than the original substance because they have been combined with oxygen.      .. More >>