Answer:
Explanation:
When copper metal is dipped into an aqueous solution of 
, copper nitrate (
) is formed. This is type of displacement reaction because copper metal displaces silver from its salt. As only one ion is being displaced, therefore, it is a single displacement reaction.
Copper displaces silver as it is more reactive than silver. This can be confirmed by position of copper and silver in reactivity series. Elements above in the reactive series displaces elements present below from their salts.
The molecular equation is as follows:
Now, write the ionic equation as follows:
Cancel the common terms,
Answer:
The centripetal acceleration of the object is 
.
Explanation:
We have,
Radius of a circular path is 2 m
It takes 5 seconds to complete 10 revolutions. It means its angular velocity is :
The centripetal acceleration of the object is given by :
So, the centripetal acceleration of the object is .
Answer:
the frequency is 18
Explanation:
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As the atomic mass of iron is 55.847u
We say that it is the mass of one mole of iron.
By formula it can be find by
No.of mole=mass in g/molar mass
Mass in gram = no.of mole x molar mass
No.of mole =1
Molar mass = 55.847g
Mass in gram = 1x55.847
= 55.847g of Fe
Answer:
chemical change
Explanation:
burning and cooking are both chemical changes.
