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Questions in chemistry

📝 Answered - What two categorical ways of thinking about matter are discussed in the passage?

📝 Answered - Complete the following chemical reactions: 1. NaOH + H\(_2\)SO\(_4\) → 2. NaOH + HNO\(_3\) → 3. Cu(OH)\(_2\) + HCl → 4. H\(_2\)SO\(_4\) → 5. HNO\(_3\) →

📝 Answered - In what respect does an atom of magnesium differ from a magnesium ion ([tex] \text{Mg}^{2+} [/tex])? A. The ion has a more stable electronic arrangement than the atom. B. The positive charge on the nucleus of the ion is two units greater than the nuclear charge on the atom. C. The ion has two more protons than the atom. D. The ion will react more readily with free [tex] \text{Cl}_2 [/tex]. E. The ion has two more planetary electrons than the atom.

📝 Answered - Explain how engineers and scientists may work together to produce a protein in the lab.

📝 Answered - Which substance will combine with oxygen gas to produce a greenhouse gas? A. Na B. S C. H₂ D. Ne E. C

📝 Answered - Which of the following molecules has polar bonds but is a nonpolar molecule? a. H₂ b. H₂O c. NH₃ d. NaCl e. CO₂ Can anyone explain this one?

📝 Answered - What is the electron configuration of helium?

📝 Answered - Heating zinc sulfide in the air causes the formation of what compound?

📝 Answered - During an investigation, a student determines that a copper sample has a density of 8.10 g/mL. What is the student's percent error if the accepted density for copper is 8.96 g/mL?

📝 Answered - **A molecule of nitrogen gas consists of two nitrogen atoms joined together. Write the formula of nitrogen gas.**