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    1-20cm^3 of ethyne C2H2 are reacted with 509cm^3 of oxygen.
    What is the total volume of gas remaining at the end of the reaction?

    I keep on getting the answer 400cm^3 but it is 490cm^3 how come??

    2- A solution contains barium ions and silver ions and one type of anion, what could anion could it be?
    A chloride only
    B nitrate only
    C sulfate only
    D all

    I thought it was D but it said it's B... Is it because of that some of the ions together form ppt and not a solution?




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    (Original post by Mme_Bonii)
    1-20cm^3 of ethyne C2H2 are reacted with 509cm^3 of oxygen.
    What is the total volume of gas remaining at the end of the reaction?

    I keep on getting the answer 400cm^3 but it is 490cm^3 how come??

    2- A solution contains barium ions and silver ions and one type of anion, what could anion could it be?
    A chloride only
    B nitrate only
    C sulfate only
    D all

    I thought it was D but it said it's B... Is it because of that some of the ions together form ppt and not a solution?




    Posted from TSR Mobile
    Nvm I got the answers


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