• Chemistry Doubt?

    Your Answer: 
    At which temperature, in K, assuming constant pressure, is the volume of a fixed mass of gas at 127 °C doubled? Can someone explain the reasoning behind the answer? Thanks in advance!
    1 week ago
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  • Chemistry homework help?

    Your Answer: 
    Tried this a million times & I m stuck. The heat of vaporization for benzaldehyde is 48.8 kJ/mol, and its normal boiling point is 451.0 K. Use this information to determine benzaldehyde’s vapor pressure (in torr) at 60.5°C. Report your answer to three significant digits
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  • Biochemistry?

    Your Answer: 
    two systems eluents for separation of amino acids different system used in this practice and RF of amino acids separate with these systems. Help
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  • Chem question?

    Your Answer: 
    4.84g of ammonium bromide is dissolved in 350 mL of a .10 M (aq) solution of potassium carbonate. Calculate the final molarity of bromide anion
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  • Is it inaccurate to report the weight of a sample to be <0.00 grams? (chemistry lab)?

    Your Answer: 
    i was weighing a very small sample of a compound that i produced from an experiment. when i weighed it on a top-loading balance, it did not read at all and it just showed 0.00g my fault for not using a more sensitive balance but with the data that i have, would it be inaccurate to say that it weighs <0.00 grams? or should i say <0.01g? i... show more
    1 week ago
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  • What techniques would you use to separate the different substances in a saturated solution of sugar (Sucrose) in water :?

    Your Answer: 
    A) Filtration and distillation B) Decantation and filtration C) extraction and filtration
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  • Forebearance?

    Your Answer: 
    1 week ago
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  • In a copper-zinc galvanic cell, why do the electrons go to Cu+2?

    Your Answer: 
    Also, why does zinc lose two electrons and not just one? Is it because Zn+2 is more stable than neutral zinc? If the answer to my original question is because Cu+2 has a +2 charge imbalance and neutral Cu is more stable than Cu+2, then why does copper form Cu+2 in the first place?
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  • How to determine if a metal is lead?

    Your Answer: 
    1 week ago
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  • Chem got me confused. Please help?

    Your Answer: 
    A chemist determined in a set of four experiments that the density of magnesium metal was 2.68g/cm3,1.69g/cm3,1.69g/cm3. The accepted value for the density is 1.74g/cm3. What can we conclude about the precision and accuracy of the chemist s data?l
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