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  1. R

    Chemistry: Post your doubts here!

  2. R

    Chemistry: Post your doubts here!

    You don't have to apply the Hess Cycle if you don't see the necessity
  3. R

    Chemistry: Post your doubts here!

    . Yes the oxygen is 0 . The backward reaction gives +284 i.e the enthalpy of formation of Carbon monoxide from carbon dioxide is +284 but care is to be taken that this isn't the standard enthalpy of formation of neither CO nor CO2 ... I hope you understand that there's a difference as this are...
  4. R

    Chemistry: Post your doubts here!

    That's an alternative method .... A faster one for that matter 🔥🔥 Both of them work accurately well but I always prefer drawing the cycle then using the formula to confirm my answer . Unless if it's multiple choice !!!
  5. R

    Chemistry: Post your doubts here!

    Or maybe we both are 🤧🤧
  6. R

    Chemistry: Post your doubts here!

    Hello .We would need the enthalpy change of formation of carbon dioxide and water so we may draw a hess cyclee diagram since we are not told that the reaction is performed at standard conditions and cannot just blindly assume
  7. R

    Chemistry: Post your doubts here!

    Because of the term 'standard' which tells us the conditions which the neutralisation occurs in . The enthalpy change of any reaction is dependent on the conditions which the reaction occurs in . The standard enthalpy change refers to when the concentration of the sulfuric acid and the base are...
  8. R

    opportunity cost

    Traveling by car means he incurs all cost relating to travelling by car . Firstly he needs to fuel the car and then park it wherever he goes . Moreover the fact that he uses the car it depreciates in value(the wear and tear costs ) . So overally him using the car means he experiences costs...
  9. R

    opportunity cost

    Answer Is C Consider the exchange ratio before anything else . Its 3H:2S and now to make your working easier you decide which currency to trade in . Either in H or in S . I decided to trade in H . A) 4H + 3S simplifies to the 4H plus the 3 shoes in terms of H gives you (9/2)H using direct...
  10. R

    Chemistry: Post your doubts here!

    Helping those who come tomorrow 😊 ... We can balance it using the balancing in alkaline conditions thus we get
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