Which one of the following statements about structure is false?
1) Electrons occupy a very large volume compared to the nucleus
2) Number of protons and neutrons is always the same in the neutral atom
3) protons and neutrons in the nucleus are tightly packed
Answer: (2) number of protons and neutrons is always the same in neutral atom
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Honor Chemistry
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- An organic compound methyl acrylate consists of 65.80% C, 37.17% O, and the rest Hydrogen (7.03%). If the molar mass of methyl acrylate is 86.1 g what are its empirical and molecular formulas?
- How many moles of Caffeine are in a 10g sample?(Hint: 194.2=1 mol).
- Calculate he molar mass of Caffeine (C8H10N4O2).
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- Which represents the greatest number of atoms?
- Consider the equation 2A + B -> A2B If you react 1.0 mol of A with 1.0 mil of B, how much A2B can be produced?
- The empirical formula of styrene is CH; its molar mass is 104.1g/ mol. What is the molecular formula of styrene?
- What is the mass of one mole of copper in grams?
- The _____ equation contains all ions and substances that are in a reaction in aqueous solution.
- When a precipitate reaction occurs the ions that do not form the precipitate
- The spectator ion in the reaction Zn(NO3)2+2NH4OH -> 2NH4NO3 + Zn(OH)2 are:
- Based on the activity series the reaction that is most likely to occur from among the following is:
- The most common factors that cause chemical reactions to occur are all the following except:
- In an oxidation reduction reaction:
- In a precipitation reaction:
- Identify the solid that forms when the following aqueous solutions are mixed: KNO3 (aq) + BaCl2 (aq)->
- Aqueous solutions of barium chloride and silver nitrate are mixed to form solid silver chloride and aqueous barium nitrates. The balanced complete ionic equation contains which correct coefficient and ion.
- You have exposed electrodes of a lightbulb in a solution of H2SO4 so that the lightbulb is on. You add a dilute solution and the bulb goes dim. Which did you add?
- Which of the following compounds is soluble in water?
- Write the formula for Sodium Chloride
- Write the formula for Sodium Cyanide
- Write the formula for Aluminum Nitrate
- Write the formula for Aluminum Chloride
- Write the formula for Zinc Chloride