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dolphi86 [110]
4 years ago
5

Trail mix is just that - a mix. Or in science terms, it is a mixture. One way you can tell this is a mixture is that you can A)

eat all the parts. B) measure the amounts of the parts. C) separate the parts by their properties. D) identify the parts that make up the mixture.
Chemistry
2 answers:
VMariaS [17]4 years ago
8 0

Answer:  Option 'd' and 'c' are  correct.

Explanation:

As we know that

Mixture is the composition of two or more different substances which are combined physically.

In mixture, the identities of substances are retained and we can identify the parts that make up the mixture.

And trail mix is composed of nuts, seeds, raisins etc. and it is heterogeneous mixture.

So, we can easily identify and separate the part by their properties too.

Hence, Option 'd' and 'c' are  correct.

Annette [7]4 years ago
5 0

Answer : C) separate the parts by their properties.

Explanation:

Mixture is a substance which has two or more components which do not combine chemically and do not have any fixed ratio in which they are present. Trail is a mixture of various substances which do not react chemically and thus the constituents retain their chemical properties. The substances can be separated by using physical properties.

Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.It can be decomposed into simpler constituents using chemical reactions. The elements lose their individual chemical properties. The elements can not be separated using physical means.

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Answer:

74mL

Explanation:

Given parameters:

Molar mass of citric acid = 192g/mol

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Concentration of citric acid  = 0.8M

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Unknown parameters:

Volume of citric acid = ?

Solution

       Equation of the reaction:

            C₆H₈O₇ + 3NaHCO₃ → Na₃C₆H₅O₇ + 3H₂O + 3CO₂

Procedure:

  • We work from the known parameters to the unknown. From the statement of the problem, we can approach the solution from the parameters of the baking powder.
  • From the baking powder, we can establish a molar relationship between the two reactants. We employ the mole concept in this regard.
  • We find the number of moles of the baking powder that went into the reaction using the expression below:

                Number of moles = \frac{mass}{molar mass}

                Number of moles =  \frac{15}{84} = 0.179mole

  • From the equation of the reaction, we can find the number of moles of the citric acid:

             3 moles of baking powder reacted with 1 mole of citric acid

 0.179 moles of baking powder would react with \frac{0.179}{3}:

          This yields 0.059mole of citric acid

  • To find the volume of the citric acid, we use the mole expression below:

    Volume of citric acid = \frac{number of moles}{concentration}

Volume of citric acid = \frac{0.059}{0.8} = 0.074L

Expressing in mL gives 74mL

               

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