Answer:
Explanation:
The activation energy represents the energy barrier that reagents must pass to transform into products (or products to transform into reagents in a reverse reaction)
For any reaction, the change in enthalpy is related to the activation energy by the equation
So, the activation energy for the reverse reaction is
- The density of the mineral fragment is
(20.47 g/cm3).
- Density can be regarded as<em> ratio of mass to the volume </em>of the object.
Density = (mass/ volume)
Given:
volume of mineral fragments= 2.57 cm3
mass = 52.6 g
density of the mineral fragment = (52.6/2.57)
= 20.47 g/cm3
- Therefore, density of the mineral fragment is (20.47 g/cm3)
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Answer:
B
Explanation:
A metathesis reaction is a reaction in which cations and anions change partners.
A general equation for a metathesis is
AX+CY→AY+CX, where A and C are cations, and X and Y are anions.
There are three possible products of a metathesis reaction.
A. an insoluble (solid) precipitate
B. water (from neutralization reaction)
C. an insoluble gas that bubbles out of solution
Metathesis reactions are also called double replacement reactions and double displacement reactions.
Answer:
The metals have the tedency to lose electrons and become positive ions
Explanation:
In order to attain noble gases electronic configuration, metals of group I A lose one electron and II A lose 2 electrons with ionization energy.
