Lab: Enthalpy — Cumulative exam Answers

What is the relationship between a mole and Avogadro’s number?

Which is an example of a nonaqueous solution?

Which equation is a decomposition reaction?

Which statement best explains the purpose of using a mole in the measurement of matter?

Which of these factors will cause a solid solute to dissolve faster?

Water is called the “universal solvent.” Which statement best explains this description with respect to ionic compounds?

The equation below shows a reaction that produces calcium carbonate.Ca(OH)2(s) + CO2(g) CaCO3(s) + H2O(l)Which describes a way to speed up the collisions between calcium hydroxide and carbon dioxide molecules to produce calcium carbonate faster?

Which characteristic best identifies an Arrhenius base?

A scientist is examining a mixture of nitrogen, hydrogen, and ammonia. The individual pressures that are exerted by nitrogen and hydrogen are 0.26 atm and 0.28 atm, respectively. If the total pressure is 0.90 atm, what is the partial pressure of ammonia?Use .

Which proportionality shows the result of combining Avogadro’s law with Boyle’s law?

Which factor influences both solubility and the rate of dissolution?

Consider the reaction pathway graph below.What is represented by D in the graph?

Which law is described by saying that when the pressure of a gas in a sealed container is cut in half, the gas will double in volume at a steady temperature?

The ideal gas constant, R has several different values that could be used. Which quantity causes these differences?

The molar mass of water (H2O) is 18.0 g/mol. A sample of water has a mass of 18.0 g. How many moles of water are contained in this sample?

The chemical equation below shows the decomposition of ammonium nitrate (NH4NO3).NH4NO3 N2O + 2H2OA chemist who is performing this reaction starts with 160.1 g of NH4NO3. The molar mass of NH4NO3 is 80.03 g/mol; the molar mass of water (H2O) is 18.01 g/mol. What mass, in grams, of H2O is produced?

A solution contains 90 mL of methanol, 18 mL of propanol, and 2 mL of diethyl ether. Which is the solvent in this solution?

What is the volume of 0.200 mol of an ideal gas at 200. kPa and 400. K?Use and .

If a compound has a molar mass of 180 g/mol and its empirical formula is CH2O, what is its molecular formula?

Chemists use activity series to determine whether which type of reaction will occur?