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Which of these facts about opossums is false?

Posted on: May 26, 2025 Last updated on: November 10, 2025 Written by: Anonymous
Which of these facts about opossums is false?
Continue reading “Which of these facts about opossums is false?”…

How many protons (p) and neutrons (n) are in an atom of Sr (…

Posted on: May 26, 2025 Last updated on: November 10, 2025 Written by: Anonymous
How many protons (p) and neutrons (n) are in an atom of Sr (strontium)?
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The density of mercury is 13.5 g/mL. What is the mass in kg…

Posted on: May 26, 2025 Last updated on: November 10, 2025 Written by: Anonymous
The density of mercury is 13.5 g/mL. What is the mass in kg of mercury that fills a 250 mL flask? Pay attention to units.
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Boron-9 (9 is the mass number) can be represented as _______…

Posted on: May 26, 2025 Last updated on: November 10, 2025 Written by: Anonymous
Boron-9 (9 is the mass number) can be represented as _____________.
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How many of the following names are correct? PCl5 potassi…

Posted on: May 26, 2025 Last updated on: May 27, 2025 Written by: Anonymous
How many of the following names are correct? PCl5 potassium pentachloride NaCN sodium cyanide KrF4 krypton tetrafluoride Fe(NO3)2 iron (II) nitrate  
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Identify one mole of a substance.

Posted on: May 26, 2025 Last updated on: November 10, 2025 Written by: Anonymous
Identify one mole of a substance.
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A sample of pure lithium carbonate contains 44.3% lithium by…

Posted on: May 26, 2025 Last updated on: May 27, 2025 Written by: Anonymous
A sample of pure lithium carbonate contains 44.3% lithium by mass. What is the % lithium by mass in a sample of pure lithium carbonate that has twice the mass of the first sample?
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The compound, NO6, is named

Posted on: May 26, 2025 Last updated on: May 27, 2025 Written by: Anonymous
The compound, NO6, is named
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Which of the following represent isotopes of the same elemen…

Posted on: May 26, 2025 Last updated on: November 10, 2025 Written by: Anonymous
Which of the following represent isotopes of the same element? (X is just a placeholder) A: X B: X C: X D: X  
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An element has two naturally occurring isotopes. One has an…

Posted on: May 26, 2025 Last updated on: November 10, 2025 Written by: Anonymous
An element has two naturally occurring isotopes. One has an abundance of 35.4% and an isotopic mass of 184.953 amu, and the other has an abundance of 64.6% and a mass of 186.956 amu. What is the average atomic mass of the element?
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