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aliya0001 [1]
3 years ago
9

Name:

Chemistry
1 answer:
inna [77]3 years ago
3 0

Answer:

1

Explanation:

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25 g of a chemical is dissolved in 75 g of water. What is the percent by mass concentration of this chemical
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300

Explanation:

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Type here. 5. What is the relationship between the amount of force in Newtons applied to the spring and the elastic potential?​
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"The higher the spring constant, the stiffer the spring. The spring constant is not the same value for different elastic objects. For a given spring and other elastic objects, the extension is directly proportional to the force applied. For example, if the force is doubled, the extension doubles."

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To determine the molar mass of an unknown organic acid, HA, a 1.056 g sample is titrated with standardized NaOH. Calculate the m
meriva

Explanation:

Equation for the given reaction is as follows.

     HA(aq) + NaOH(aq) \rightarrow NaA(aq) + H_{2}O(l)

Therefore, moles of NaOH and HA are calculated as follows.

     Moles of NaOH = 0.256 M \times 0.03378 L

                                = 8.64 \times 10^{-3}

                                = 0.00864 mol

     Moles of HA = 0.00864

Also,  moles = \frac{\text{weight}}{\text{molecular weight}}

      Molecular weight = \frac{1.056 g}{0.00864 mol}

                                    = 122.22 g/mol

Thus, we can conclude that molar mass of given unknown organic acid is 122.22 g/mol.

4 0
3 years ago
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