Questions from General Chemistry


Q: If an average sodium atom has a mass of 3.82

If an average sodium atom has a mass of 3.82 * 10-23 g, what is the mass of a magnesium atom in grams?

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Q: If an average fluorine atom has a mass of 3.16

If an average fluorine atom has a mass of 3.16 * 10-23 g, what is the average mass of a chlorine atom in grams?

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Q: Which has the smaller mass, 1 mole of He atoms or

Which has the smaller mass, 1 mole of He atoms or 4 moles of H atoms?

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Q: Which weighs less, 0.25 mole of xenon atoms or

Which weighs less, 0.25 mole of xenon atoms or 2.0 moles of carbon atoms?

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Q: What quantity serves as the conversion factor between the mass of a

What quantity serves as the conversion factor between the mass of a sample and how many moles the sample contains?

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Q: What does it mean to say that the balanced chemical equation for

What does it mean to say that the balanced chemical equation for a reaction describes the stoichiometry of the reaction?

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Q: Write the formula and calculate the molar mass for each of the

Write the formula and calculate the molar mass for each of the following substances. a. barium chloride b. aluminum nitrate c. iron(II) chloride d. sulfur dioxide e. calcium acetate

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Q: The vigorous reaction between aluminum and iodine gives the balanced equation:

The vigorous reaction between aluminum and iodine gives the balanced equation: 2Al(s) + 3I2(s) 2AlI3(s). What do the coefficients in this balanced chemical equation tell us about the prop...

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Q: Although mass is a property of matter we can conveniently measure in

Although mass is a property of matter we can conveniently measure in the laboratory, the coefficients of a balanced chemical equation are not directly interpreted on the basis of mass. Explain why.

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Q: Which of the following statements is true for the reaction of nitrogen

Which of the following statements is true for the reaction of nitrogen gas with hydrogen gas to produce ammonia (NH3)? Choose the best answer. a. Subscripts can be changed to balance this equation, j...

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