How many sig figs? 78.65
Answer: 4
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Honor Chemistry
- How many molecules of phosphoric acid (H3PO4) react with excess calcium carbonate (CaCO3) to produce 25.0 g of Ca3(PO4)2?
- 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).
- A 3.0 mol sample of KClO3 was decomposed according to the equation 2KClO3 (s)-> 2KCl (s) + 3O2. How many moles of O2 are formed assuming 100% yield.
- 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