Saturday
October 25, 2014

Homework Help: Science-Chemistry

Posted by Immy on Monday, September 13, 2010 at 8:10pm.

Analysis questions:

A) What evidence is there that the gas bubbles formed in the first part of the investigation were hydrogen gas?

Answer: Evidence there was that proved that the gas bubbles formed in the first part of the investigation were hydrogen gas is that there was this popping noise and it was igniting.

-I was not quite that sure of what else to add in my answer, so if u could add to this, then I will be very thankful to you.

B) The reaction of zinc metal and hydrochloric acid creates hydrogen gas, an element. what property of this element requires u to keep the second tube upside down.

Answer: Property of this element which requires u to keep the second tube upside down is that it can be reactive depending on the kind of atmosphere around.

C) What evidence is there that the compound formed in the second test tube is water?

C) It is water because appears as a clear liquid.

D) Water has the chemical formula H2O. Where did the hydrogen (H) and oxygen (O) atoms required to form the water molecules come from?

Answer: Not sure.

E) Did the investigation verify ur prediction? Explain.

Answer: Yes, the invesigation verified my prediction becuase it proved that an element van be seperated from a compound and that an element can form a compound.

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