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Author: Anonymous (page 36,766)

Which two particles of the atom have nearly identical masses…

Posted on: June 6, 2025 Last updated on: June 6, 2025 Written by: Anonymous
Which two particles of the atom have nearly identical masses? 
Continue reading “Which two particles of the atom have nearly identical masses…”…

The density of water is approximately 1 g/cm³. Which of thes…

Posted on: June 6, 2025 Last updated on: June 6, 2025 Written by: Anonymous
The density of water is approximately 1 g/cm³. Which of these substances will sink in water? 
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What is the atomic symbol and mass number for an atom contai…

Posted on: June 6, 2025 Last updated on: June 6, 2025 Written by: Anonymous
What is the atomic symbol and mass number for an atom containing 50 protons and 64 neutrons? 
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A pool is treated with calcium hypochlorite pool shock. If C…

Posted on: June 6, 2025 Last updated on: June 6, 2025 Written by: Anonymous
A pool is treated with calcium hypochlorite pool shock. If Ca(OCl)₂ has 50.0% available chlorine by mass, what ppm chlorine increase will result from the addition of 2.00 kg of pool shock to a 40.0 x 10³ L swimming pool? (density of water = 1.00 kg/L)
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What is the concentration of lithium ions in 0.450 M Li₂SO₄?

Posted on: June 6, 2025 Last updated on: June 6, 2025 Written by: Anonymous
What is the concentration of lithium ions in 0.450 M Li₂SO₄?
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A chemist encounters an unknown metal. They drop the metal i…

Posted on: June 6, 2025 Last updated on: June 6, 2025 Written by: Anonymous
A chemist encounters an unknown metal. They drop the metal into a graduated cylinder containing water, and find the volume change is 6.90 mL. If the metal weighs 9.84 g, what is the density of the metal in g/mL? (Just put the number and no units.) 
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Which one of the following represents the molecular equation…

Posted on: June 6, 2025 Last updated on: June 6, 2025 Written by: Anonymous
Which one of the following represents the molecular equation for the reaction of NH₃ with HI?
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A 1.000 g sample of an unknown compound containing only carb…

Posted on: June 6, 2025 Last updated on: June 6, 2025 Written by: Anonymous
A 1.000 g sample of an unknown compound containing only carbon, hydrogen, and oxygen was analyzed through combustion analysis and yielded 2.224 g of CO₂ and 0.3035 g of H₂O. What is the compound’s empirical formula?
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What quantity in moles of CH₃OH are there in 150.0 mL of 0.2…

Posted on: June 6, 2025 Last updated on: June 6, 2025 Written by: Anonymous
What quantity in moles of CH₃OH are there in 150.0 mL of 0.210 M CH₃OH?
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The number -1.025 × 10⁻³ when taken out of scientific notati…

Posted on: June 6, 2025 Last updated on: June 6, 2025 Written by: Anonymous
The number -1.025 × 10⁻³ when taken out of scientific notation would be
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