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    chemistry HW question help please? thanks!?

    Molecular mass is measured in daltons or atomic mass units (same thing); molar mass is measured in grams. The number is the same, but the unit is different.
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    stuck on chemistry problem help please?

    First balance the equation: 2Al + 3Br2 = Al2Br6 From this, you can see that you need 2 mol of Al to make 1 mol of Al2Br6, so you need 4.86 mol of Al to answer the question.
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    Will I fail my drug test?

    THC is fat soluble; water does nothing. It may be detectable for up to 30 days.
  4. D

    Will I fail my drug test?

    THC is fat soluble; water does nothing. It may be detectable for up to 30 days.
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    Chemistry help please?

    There are 4 significant digits (the first multiplicand has 4, the second 5 and the last 5). Multiply it out and round off to 4 digits. 401.4
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    Biology AS/ protein synthesis.?

    For biological systems, yes - though you also need the ribosome present to actually translate the RNA into a protein (that's where the synthetic enzymes are actually found). To clarify the previous answerer: most proteins have hundreds-to-thousands of amino acid residues. There are 20 amino...
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    chemistry help please?

    1 mole of anything contains 6.023 x 10^23 pieces (atoms or molecules); this is called Avogadro's number, and you just have to memorize it. 1 mole of a pure element weighs the same in grams as the element's atomic weight in daltons. 1 mole of a pure compound weighs the same in grams as the...
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