  # mars_mhel

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1. I did the first part but then i have no clue on how to start the other.. here's the question: The reaction occurs at a temperature of 29.0 degress celsius and a pressure of 110kPa. Calculate the volume of gas that would produce if 720 mL of 1.35M sulfuric acid and 55.0g of zinc is used. H2SO4 + Zn --> ZnSO4 + H2 n=(1.35M)(0.72L) n= 55.0/65.38 n=0.972 mol n= 0.841 mol V= nRT/P V= (0.841*8.314*302.15) \ 110 V= 19.2L question b: When the reaction is part "a" occurs, 10.7 ml of water are produced. Calculate the percent error... i'm not sure how i can get water..
2. Hi!As in the subject, we're doing that in math but I'm having a hard time to understand the concept of what's going on especially when it comes to interest, half-life, most of the questions regarding to what this topic is about. We have this formula T=S®^P I'm confused on how to use this formula. Can anyone please explain?
3. HI! I don't know how to answer this question about stoichiomestry! any ideas? The potassium salt of benzoic acid, potassium benzoate, KC7H5O2, can be made by the action of potassium permanganate on toluene, C7H8. C7H8 + 2 KMnO4 --> KC7H5O2 + 2MnO2 + KOH + H2O If the yield of potassium benzoate cannot be realistically be expected to be more than 71%, what is the minimum number of grams of toluene needed to achieve this yield while producing 11.5 g of potassium benzoate?
4. HI! I don't know how to answer this question about stoichiomestry! any ideas? The potassium salt of benzoic acid, potassium benzoate, KC7H5O2, can be made by the action of potassium permanganate on toluene, C7H8. C7H8 + 2 KMnO4 --> 2MnO2 + KOH + H2O If the yield of potassium benzoate cannot be realistically be expected to be more than 71%, what is the minimum number of grams of toluene needed to achieve this yield while producing 11.5 g of potassium benzoate?
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