2023: NY Regents - Chemistry
By Sara Cowley
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Last updated 3 months ago
85 Questions
Note from the author:
From the New York State Education Department. The University of the State of New York Regents High School Examination Physical Setting Chemistry January 2023. Internet. Available from https://www.nysedregents.org/Chemistry/123/chem12023-exam.pdf; accessed 3, May, 2023.
From the New York State Education Department. The University of the State of New York Regents High School Examination Physical Setting Chemistry January 2023. Internet. Available from https://www.nysedregents.org/Chemistry/123/chem12023-exam.pdf; accessed 3, May, 2023.
Base your answers to questions 53 and 54 on the information below and on your knowledge of chemistry.
The first four elements in Group 14 are carbon, silicon, germanium, and tin. These elements form compounds with chlorine that have similar formulas. Two examples of these formulas are silicon tetrachloride, SiCl4, and germanium tetrachloride, GeCl4.
Base your answers to questions 58 through 60 on the information below and on your knowledge of chemistry.
A sample of helium gas, \mathrm{He(g)}, is placed in a rigid cylinder sealed with a movable piston. The temperature of the helium is 25.0°C. The volume of the helium is 300. milliliters and the pressure is 0.500 atmosphere.
Base your answers to questions 61 and 62 on the information below and on your knowledge of chemistry.
During a laboratory activity, a student places 21.0 mL of hydrochloric acid solution, \mathrm{HCl(aq)}, of unknown concentration into a flask. The solution is titrated with 0.125 M \mathrm{NaOH(aq)} until the acid is exactly neutralized. The volume of \mathrm{NaOH(aq)} added is 18.5 milliliters. During this laboratory activity, appropriate safety equipment is used and safety procedures are followed.
Base your answers to questions 63 through 65 on the information below and on your knowledge of chemistry.
The table below lists the hydronium ion concentration and pH values of four different solutions and distilled water. The pH value is missing for sample 2.
Base your answers to questions 66 through 68 on the information below and on your knowledge of chemistry.
Boric acid, H3BO3, is heated to produce tetraboric acid, H2B4O7, and water. The equation below represents the reaction to form tetraboric acid.
The tetraboric acid is then used to make borax, which is used as a cleaning agent. Borax, Na2B4O7.
Base your answers to questions 69 through 71 on the information below and on your knowledge of chemistry.
During a laboratory activity, appropriate safety equipment is used and safety procedures are followed. A student uses the lab equipment shown in the diagram below to determine the heat of combustion of candle wax.
Heat of combustion is defined as the amount of heat released when a known mass of a substance is burned and can be measured in joules per gram. At the start of the activity, the mass of the candle and the mass of the water are measured. The starting temperature of the water is 5.0°C, and the air temperature in the room is 22.0°C. The candle is lit, and the water is stirred with a stirring rod. Several minutes later, the candle is extinguished, and the student measures the temperature of the water in the can. When the candle is cool, the student measures the final mass of the candle. Lab activity results are shown in the table below.
Base your answers to questions 72 through 76 on the information below and on your knowledge of chemistry.
A process was developed in 1912 to produce ammonia gas from atmospheric nitrogen gas and hydrogen gas. Iron can be used as a catalyst. The equation representing this system at equilibrium is shown below.
Base your answers to questions 77 through 79 on the information below and on your knowledge of chemistry.
Before the year 1828, it was thought that organic compounds were produced only by living organisms and that inorganic compounds were made from nonliving substances. Urea is an organic compound. In 1828, a chemist heated ammonium cyanate and produced urea, which is very soluble in water. The equation below represents this reaction.
Base your answers to questions 80 and 81 on the information below and on your knowledge of chemistry.
When a voltmeter is connected in the circuit of a voltaic cell, an electrical measurement called voltage can be read on the meter. The voltage of the cell is affected if the concentration of the solute in the half-cells is changed. The diagram, the ionic equation, and the graph below represent a copper-zinc cell. When the switch is closed, electricity flows through the circuit as the cell operates at constant temperature.
Base your answers to questions 82 through 85 on the information below and on your knowledge of chemistry.
Synthetic radioisotopes may be made by bombarding other nuclides with neutrons. The equations below represent a sequence of reactions converting stable iron–58 to cobalt–60, which is used in medical treatments.