21. displacement reaction
22. melting is an endothermic reaction
23. catalyst used in the preparation of methane from sodium ethanoate is
24. size of the container do not affect the chemical reaction
25. group of organic compounds which differ by one CH2 GROUP IS CALLED
IS homologous series
i hope this will help you :)
9.02 * 10^23 atoms is contained in the molar mass of the element so we check with the periodic table.
the metal whose molar mass is 55.85 is iron (answer).