Some basic concepts of chemistry {moles} 2

         

                YASH CLASSES

 1.How many atoms of fluorine are present in

   2.1x 10^-5 gram of fluorine?

2.How many moles of gold are present in

    25.8 g of gold rod?

 3. 3.022x10²³ molecules of a substance weigh 22mg. 

    What is the molar mass of the substance?

 4.How many atoms of fluorine are present in

     3.2x 10^-5 gram of fluorine?

5..How many moles of gold are present 

    in 15.2 g of gold rod?

 6. 6.022x10²³ molecules of a substance weigh 88mg.

    What is the molar mass of the substance?

 7.How many atoms of fluorine are present in 

    5.1x 10^-5 gram of fluorine?

  8.How many moles of gold are present in 

    30 g of gold rod?

  9. 9.022x10¹² molecules of a substance weigh 22mg. 

   What is the molar mass of the substance?

 10.How many atoms of fluorine are present in

    5.5x 10^-5 gram of fluorine?

 11.How many moles of gold are present in

      35.5 g of gold rod?

 12. 12.022x10²³ molecules of a substance weigh 44mg. 

     What is the molar mass of the substance?

13.How many atoms of fluorine are present in

     8.2x 10^-5 gram of fluorine?

14.How many moles of gold are present in 

    20.5g of gold rod?

 15. 18.022x10²³ molecules of a substance weigh 55mg. 

   What is the molar mass of the substance?