A student requires 2.00 L of 0.100 M NH4NO3 from a 1.75 M NH4NO3 stock solution. What is the correct way to get the solution?
A. Measure 114 mL of the 1.75 M solution, and dilute it to 1.00 L.
B. Measure 114 mL of the 1.75 M solution, and dilute it to 2.00 L.
C. Measure 8.75 mL of the 1.75 M sol...
Chemistry Cumulative Exam Questions and answers A student requires 2.00 L of 0.100 M NH4NO3 from a 1.75 M NH4NO3 stock solution. What is the correct way to get the solution? A. Measure 114 mL of the 1.75 M solution, and dilute it to 1.00 L. B. Measure 114 mL of the 1.75 M solution, and dilute it to 2.00 L. C. Measure 8.75 mL of the 1.75 M solution, and dilute it to 2.00 L. D. Measure 8.75 mL of the 0.100 M solution, and dilute it to 2.00 L. - B What does the symbol ( -Hfus) indicate in a phase change? A. A gas is being formed. B. A gas is being liquefied. C. A solid is being formed. D. A liquid is being vaporized. - C Consider the following reversible reaction.What is the equilibrium constant expression for the given system? A. [CO2]/[C][O2] B. [CO2]/[O2] C. [C][O2]/[CO2] D. [O2]/CO2] - B The molar mass of NaOH is 40.00 g/mol. If 5.20 g NaOH are dissolved in 0.500 L of solution, what is the molarity of the solution?Use molarity=moles of solute/liters of solution A. 0.0125 M B. 0.260 M C. 3.85 M D. 7.69 M - B A solar panel combines multiple photovoltaic cells. Which type of energy is used to power a solar panel? A. kinetic energy B. thermal energy C. electromagnetic energy D. gravitational potential energy - C How much of a sample remains after five half -lives have occurred? A. 1/5 of the original sample B. 1/25 of the original sample C. 1/32 of the original sample D. 1/64 of the original sample - C Consider the energy diagram below. Which statement best describes the diagram? A. The pathway A -B-D involves a catalyst and is slower than A -C-D. B. The pathway A -B-D involves a catalyst and is faster than A -C-D. C. The pathway A -C-D involves a catalyst and is slower than A -B-D. D. The pathway A -C-D involves a catalyst and is faster than A -B-D. - A Pure water at 25°C
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