Chemistry » Page 19

Elizabeth Wheeler

Chemistry

What is true of an acidic solution at room temperature? it is slippery to the touch. it has a bitter taste. it has a ph value below 7. it is a non-electrolyte?

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Chemistry

What can happen when two plates boarding each other suddenly move and release energy? A) Earth's crusts shakes. B) Lava erupts. C) A trench is formed. D) Mountains are created.

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Chemistry

6) When a substance such as ice melts, its temperature increases. Describe what happens to the arrangement of the water molecules as the temperature increases

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Chemistry

What is electronegativity and how does it affect interactions between water molecules?

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Chemistry

Characteristics of bipolar disorder typically include

a. hypochondria.

b. difficulty concentrating.

c. attacks of amnesia.

d. manipulation of others

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Chemistry

Do the benefits of medical marijuana justify its legality?

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Chemistry

In the reaction C+02 arrow C02 which element is reduced in the reaction? C O2 CO2

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Chemistry

Which of the following correctly identifies steps used in the fractional distillation of petroleum?

The mixture is cooled, condenses, then heated and boils.

The mixture is cooled, boils, then heated and condense.

The mixture is heated, condenses, then cooled and boils.

The mixture is heated, boils then cooled and condenses.

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Chemistry

What is the formula of the most stable oxide of francium?

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Chemistry

You just calculated that the heat of fusion for chloromethane is 6400 J/mol. The heat of fusion for hydrogen is 120 J/mol. Which of the following account for this difference?

a. Hydrogen has stronger intermolecular forces than chloromethane.

b. Hydrogen molecules can pack more closely than chloromethane molecules.

c. Chloromethane can absorb more energy at the same temperature.

d. Chloromethane experiences dipole-dipole interactions.

e. Chloromethane has a higher molar mass than hydrogen.

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Chemistry

Magnesium burns with a very bright light. When the flame goes out, a White powder is left behind. what is the word equation for this reaction.

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Chemistry

Identify the types of intermolecular forces found for each of the liquids and relate these to the shape of the drop as seen from the side. Include the terms cohesive and adhesive forces properly in your explanations.

What forces (dipole-dipole, hydrogen bonds, or dispersion forces) are present in each sample?

a) C12H26 (oil)

b) H2O (water)

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Chemistry

Which type of experiment follows ethical standards?

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Chemistry

What kind of change occurs when a compound is separated into its components?

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Chemistry

The reaction rate low is independent of which of the following charactetics • Reactor type] • Temperature • Concentration of components • Pressure

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