F.2 Science
2007-10-17 5:01 am
1. Suppose there are two test tubes and they both contain hydrogencarbonate indicator inside. Test tube X also has mealworms in muslin bag while test tube Y also has an empty muslin bag. What is the colour of the hydrogencarbonate indicator in each test tube after one hour?
回答 (2)
2007-10-21 10:43 pm
✔ 最佳答案
Test tube X will changed from red to yellow.Test tube Y will remains unchanged.
2007-10-17 5:16 am
test tube X is yellow
test tube Y is still red too
l think we are using the same science text book HA!
test tube Y is still red too
l think we are using the same science text book HA!
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