Science Problem!! please help?

Posted on 2014-11-15 12:29:00 in Chemistry by JACKLIN

1. How do you know a chemical equation is balanced?

2. What is the difference between a coefficient and a subscript?

3. In the reaction: methane plus oxygen yields carbon dioxide and water; what are the reactants? what are the products?
4. Two colorless solutions are mixed together. Bubbles form as the solution is stirred. Give two possible explanations for this result.
5. Name three signs or indications that a chemical reaction has occurred.

6. State which type of bond is present in CaS and discuss reasons for your answer.

7. In the reaction of a candle burning, is energy released or absorbed?

8. Jennifer gets some ice from her freezer and accidentally drops a piece of ice on the floor of her kitchen. Her Mother comes
home and sees a puddle of water on the floor. Jennifer's Mother asks Jennifer to clean up the chemical reaction that has occurred
on the floor. Is Jennifer's Mother correct or incorrect to call what has happened a chemical reaction? Explain why or why not."

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