Answer:
The six changes are: Freezing: the substance changes from a liquid to a solid. Melting: the substance changes back from the solid to the liquid. Condensation: the substance changes from a gas to a liquid.
A.
elements C H N
percentage composition 74.03 8.70 17.27
Molecular mass 12 1 14
# of mole 6.17 8.70 1.23
÷smallest mole 5.0 7.0 1.0
mole ratio 5 : 7 ; 1
THE EMPERICAL FORMUKLA FOR A. IS C5H7O
NOTE: #of mole = percentage composition ÷ Mr
and the ÷ smallest mole is used to find the ratio...for the above question a. it is 1.23
and b. should be done using the same procedure
Answer:
Balanced chemical equation:
2AgNO₃ + Zn → ZnNO₃ + 2Ag
Type of reaction:
It is the single replacement reaction.
Explanation:
Consider the reaction between zinc and silver nitrate. In this chemical reaction the zinc is substituted in place of silver in silver nitrate compound.
Chemical equation:
AgNO₃ + Zn → ZnNO₃ + Ag
Balanced chemical equation:
2AgNO₃ + Zn → ZnNO₃ + 2Ag
The starting material consist of compound ( AgNO₃) and pure element (Zn).
After reaction a new compound ( ZnNO₃) and pure element (Ag) is generated.
Type of reaction:
It is the single replacement reaction.
Single replacement:
It is the reaction in which one elements replace the other element in compound.
AB + C → AC + B
Answer:
Khfxgkhxxkfhkugxxiufxhfixiyf
Explanation:
Xlufy8fxtukuxfxtu
