Question

63 gram of nitric acid as 6.022 into 10 ^ 23 number of atoms and 63 gram of nitric acid makes 1 mole of nitric acid calculate the number of atoms and most present in 15.75 gram of nitric acid​

Answer 1

Given,

63 gram of nitric acid = 6.022 × 10²³ number of atoms

                                    = 1 mole of nitric acid

∴ 15.75 gram of nitric acid = $\frac{1}{15.75}$ moles

                                           = 0.06 moles

Also,

∵ 1 mole of nitric acid  = 6.022 × 10²³ number of atoms

⇒ 0.06 moles = 6.022 × 10²³ × 0.06

                        = 0.361 × 10²³ number of atoms  

                        = 3.61 × 10²² number of atoms  

Hence, 15.75 gram of nitric acid has 3.61 × 10²² number of atoms and 0.06 moles of nitric acid.