The density of silver is 10.5 g/cm^3. what is the volume of a piece of ag that contains 2.8 × 10^22 atoms?

0.4777 cm³

Explanation:

Molar mass is defined as the mass of 1 mole of the substance.  

The molar mass fo Ag is 107.8682 g/mol

Since, 1 mole of Ag contains 6.022×10²³ molecules of Ag

So,  

6.022×10²³ molecules of Ag has a mass of 107.8682 g

Also,  

1 molecule of Ag has a mass of 107.8682/6.022×10²³  g

2.8×10²² molecules of Ag has a mass of (107.8682/6.022×10²³)×2.8×10²²  g

Mass of 2.8×10²² molecules = 5.0155 g

Given that density = 10.5 g/cm³

Volume = ?

So, volume:  

Volume = 0.4777 cm³

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.