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2 years ago

6

in which sample of water do the molecules have the highest average kinetic energy 1)20. mL at 100.°C 2)40. mL at 80. °C 3)60. mL

at 60.° C 4)80. ml at 40.° C

1 answer:

miv72 [106K]2 years ago

6 0

100°C because all the molecules are moving the fastest past each other

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Answer:

d.) It is a binary molecular compound.

Explanation:

The compound in question has a formula $M{x}T_{y}$ . The compound is not acidic in nature and the element 'M' is not a metal. This shows that the compound does not contain any metal. Based on the definition of a binary molecular compound as a compound comprising elements that are not metals. Therefore, the compound is obviously a binary molecular compound.

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The graph shows the amount of a gaseous product formed over time during two trials of a reaction. A different concentration of a

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Trial 2, because the amount of product formed per unit time is higher.

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Valproic acid, used to treat seizures and bipolar disorder, is composed of C, H, and O. A 0.165-g sample is combusted to produce

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Answer:

The empirical formula is = $C_4H_8O$

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Moles of $H_2O$ = 0.166 g /18 g/mol = 0.00922 moles

2 moles of hydrogen atoms are present in 1 mole of water. So,

<u>Moles of H = 2 x 0.00922 = 0.01844 moles </u>

Molar mass of H atom = 1.008 g/mol

<u>Mass of H in molecule = 0.01844 x 1.008 = 0.018588 g </u>

Mass of carbon dioxide obtained = 0.403 g

Molar mass of carbon dioxide = 44.01 g/mol

Moles of $CO_2$ = 0.403 g /44.01 g/mol = 0.009157 moles

1 mole of carbon atoms are present in 1 mole of carbon dioxide. So,

<u>Moles of C = 0.009157 moles </u>

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<u>Mass of C in molecule = 0.009157 x 12.0107 = 0.11 g </u>

<u>Given that the Valproic acid only contains hydrogen, oxygen and carbon. </u>So,

Mass of O in the sample = Total mass - Mass of C - Mass of H

Mass of the sample = 0.165 g

<u>Mass of O in sample = 0.165 - 0.11 - 0.018588 = 0.036412 g </u>

Molar mass of O = 15.999 g/mol

<u>Moles of O = 0.036412 / 15.999 = 0.002276 moles</u>

<u></u>

<u>Taking the simplest ratio for H, O and C as: </u>

<u>0.01844 : 0.002276 : 0.009157</u>

<u> = 8 : 1 : 4</u>

The empirical formula is = $C_4H_8O$

Molecular formulas is the actual number of atoms of each element in the compound while empirical formulas is the simplest or reduced ratio of the elements in the compound.

Thus,

Molecular mass = n × Empirical mass

Where, n is any positive number from 1, 2, 3...

Mass from the Empirical formula = 4×12 + 8×1 + 16= 72 g/mol

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Molecular mass = n × Empirical mass

144 = n × 72

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The formula of Valproic acid = $C_8H_{16}O_2$

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<h3>Answer:</h3>

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<h3>Explanation:</h3>

We are given;

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Initial volume, V1 = 0.985 L

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Final volume, V2 = 1.030 L

We are required to find final air pressure;

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Therefore, the air pressure at the top of the mountain is 0.95 atm

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