Calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 9.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol.

The number of electrons in the given amount of silver are

Explanation:

To calculate the number of moles, we use the equation:

Given mass of silver = 9.0 g

Molar mass of silver = 107.87 g/mol

Putting values in above equation, we get:

We are given:

Number of electrons in one atom of silver = 47

According to mole concept:

1 mole of an element contains number of particles

So, 0.0834 moles of silver contains number of electrons

Hence, the number of electrons in the given amount of silver are

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.