<span>M<span><span>g<span>(s)</span></span>+</span>2HC<span>l<span>(aq)</span></span>→MgC<span>l<span>2<span>(aq)</span></span></span>+<span>H<span>2<span>(g)</span></span></span></span>
Explanation:
The reaction between magnesium and hydrochloric
acid combine to form a salt of magnesium chloride and release hydrogen
gas. This single replacement reaction is a classic example of a metal
reacting in an acid to release hydrogen gas.
0.01068g
Explanation:
Given parameters :
Number of atoms = 5.34 x 10²⁰ atoms
Molar mass of carbon = 12g
Unknown:
Mass of carbon = ?
Solution:
A mole of a substance is unit that contains the Avogadro's number of particles.
1 mole = 6.02 x 10²³ atoms ;
In 5.34 x 10²⁰ ;
Number of moles = 
= 8.9 x 10⁻⁴moles
Mass = number of moles x molar mass = 8.9 x 10⁻⁴ x 12 = 0.01068g
learn more:
Molar mass brainly.com/question/2861244
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Copper is formed of copper atoms, which are closely clustered together. If observed closely, one could witness the movement of electrons between the atoms of the copper. Each copper atom turns into a positive ion by losing one electron. Thus, copper is a lattice of positive copper ions with the movement of free electrons among them.
Due to movement of electrons freely through the metal, they are also known as conduction electrons. The presence of these conduction electrons makes the copper a good conductor of electricity and heat.
