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Zn (s) + Cu^2 + (aq) - ->Zn^2 + (aq) In this reaction, Zinc ___ electrons, Therefore it's the ___ agent. A) loses, oxidizing B) gains, reducing C) loses, reducing D) gains, oxidizing

Which of the choices correctly describes a person who is semi-retired? A. The person has partly retired, but still works sometimes. B. The person is officially retired. C. The person has been retired for a very long time. D.

Calcium chloride (cacl2) is an ionic compound that dissociates in water. a chemist forms a solution by mixing 0.50 mol cacl2 and 1.0 kg of water. how many moles of ions are in the solution?

Which action would speed up a chemical reaction in aqueous solution? adding more powdered reactants adding excess cold water removing a catalyst cooling the reaction mixture

Based on their positions in the periodic table, which two elements would most readily combine to make a stable compound? A. hydrogen (H) and lithium (Li) B. sodium (Na) and magnesium (Mg) C. helium (He) and neon (Ne) D. sodium (Na) and chlorine (Cl)

2A balloon filled with helium occupies 20.0 L at 1.50 atm and 25°C. How many moles of helium will there be in the balloon at STP? A. 22.4 moles B. 1.12 moles C. 0.0446 moles D. 0.893 moles E. 1.23 moles F. 4.55 moles

1. Which has a larger radius Ca atom or Ca+2 ion? 2. Which has a greater radius F atom or F - ion? 3. Which is the correct way of understanding the trend for Ionic radius Vs. Atomic radius?

For which of the following activities might you want to hire a chemist? A. examining the structure of plant cells B. building a fence C. building a wood storage shed D.

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Andrea is performing an experiment in which she needs to know when a strong acid is present. She is not sure which indicator to use, so she looks up the following table in her science textbook. Indicator pH range thymol Blue 1.2 - 2.8 phenol Red 6.