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galina1969 [7]
3 years ago
15

Which units describe the molarity of an aqueous sucrose solution? moles of sucrose per liter of solution grams of solution per l

iter of solution moles of sucrose per mole of water grams of sucrose per mole of sucrose?
Chemistry
2 answers:
r-ruslan [8.4K]3 years ago
7 0
Molarity is one way of expressing concentration of solutions. It has units of moles of solute per liter of the solution. Take note, this is not only for sucrose solution, this is used for every solution. The correct answer from the choices is "moles of sucrose per liter of solution ".
Virty [35]3 years ago
3 0

moles of sucrose per liter of solution


i just took the test

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A 0.98 gram sample of a volatile liquid was heated to 348 k. the gas occupied 265 ml of space at a pressure of 0.95 atm. what is
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Answer:

The molecular weight is Z =  111.2 \ g/mol

Explanation:

From the question we are told that

   The mass of the sample is  m =  0.98 \  g

    The temperature is  T  =  348 K

    The volume which the gas occupied is  V  =  265 \ ml  = 265 *10^{-3} L

     The pressure is  P  =  0.95 \  atm

Generally from the ideal gas equation we have that

       PV  =  n RT

Here n is the number of moles of the gas while the R is the gas constant with value  R  =  0.0821 \ atm \cdot L  \cdot mol^{-1} \cdot K^{-1}

        n = \frac{PV}{ RT}

=>      n = \frac{ 0.95 * 265 *10^{-3} }{   0.0821 * 348}

=>      n = 0.00881 \  mol

Generally the molecular weight is mathematically represented as

          Z =  \frac{m}{n}

=>      Z =  \frac{0.98 }{0.00881}

=>      Z =  111.2 \ g/mol

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