1. How many molecules of S2 gas are in 756.2 L? a. 2.032 x 1025 molecules S,
b. 3.022 x 1023 molecules S,
c. 4.302 x 10 molecules S
d. 8.203 x 10' molecules S2

 The reaction  which is an example of heterogenous  catalysis is

Ethene  gas  reacts  with  hydrogen  gas  using  a nickel  catalyst

 Explanation.

 Heterogenous  catalysis-  is the form of catalysis in which the phase  of  catalyst   differ from that of reactant.

 In the reaction of ethene gas + hydrogen  gas  using  a nickel catalyst  is an example  of heterogenous  catalysis since  ethene and  hydrogen are  in different phase with Nickel.

 Ethene  and hydrogen is in gaseous  state while  nickel  is in solid  state.