Question

please can anyone answer these questions??

Answer 1

Answer- 1. Molar mass of H2SO4 = 98

1 mole of H2SO4 = Molar mass of H2SO4
                             = 98 g

Number of molecules of H2SO4 in 4.9 g  =  4.9/98
                                                                      =  1/20
                                                                      =  0.05 moles 

So, 0.05 moles of H2SO4 are there in 4.9 g


Answer 2.  1 mole of H2O (Water) = 6.022 x 10²³
             
                 but here given 0.1 mole
 
  Therefore,   0.1 / 6.022 x 10²³
                     
                     = 6.022 x 10²² 

Hence, 6.022 x 10²² hydrogen atoms are there in 0.1 mole of water.

Answer 2

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Answer- 1. Molar mass of H2SO4 = 98

1 mole of H2SO4 = Molar mass of H2SO4

                             = 98 g

Number of molecules of H2SO4 in 4.9 g  =  4.9/98

                                                                      =  1/20

                                                                      =  0.05 moles 

So, 0.05 moles of H2SO4 are there in 4.9 g

Answer 2.  1 mole of H2O (Water) = 6.022 x 10²³

             

                 but here given 0.1 mole

 

  Therefore,   0.1 / 6.022 x 10²³

                     

                     = 6.022 x 10²² 

Hence, 6.022 x 10²² hydrogen atoms are there in 0.1 mole of water.