August 2024 Chemistry Regents Questions 31-40 Question Preview (ID: 63417)

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A student calculates the density of a sample of Fe to be 7.57 grams per cubic centimeter. Based on Table S, what is the percent error for the student’s calculated density of Fe?

a) -0.038%

b) -0.040%

c) -3.8%

d) -4.0%

Which general trend is observed as the elements in Group 17 are considered in order of increasing atomic number from fluorine to iodine?

a) increase in first ionization energy

b) increase in boiling point

c) decrease in melting point

d) decrease in density

Which type of chemical reaction is represented by this equation?

a) synthesis

b) decomposition

c) single replacement

d) double replacement

At STP, which property can be used to differentiate a 2.0-gram sample of NaCl(s) from a 2.0-gram sample of AgCl(s)?

a) mass

b) solubility

c) phase

d) temperature

Which particle model diagram represents a sample of neon at 35 K and 1.0 atmosphere?

a) 1

b) 2

c) 3

d) 4

Which formula represents a molecule with the most polar bond?

a) F2

b) H2

c) HCl

d) HBr

What is the amount of heat that must be absorbed to increase the temperature of a 130.-gram sample of water from 20.0°C to 50.0°C?

a) 3.90 x 10^3 J

b) 1.63 x 10^4 J

c) 2.94 x 10^5 J

d) 3.90 x 10^3 J

Which conditions of volume, pressure, and temperature in the second cylinder would result in the number of helium atoms being equal to the number of argon atoms in the first cylinder?

a) 50. mL, 0.5 atm, 546 K

b) 50. mL, 1.0 atm, 273 K

c) 100. mL, 0.5 atm, 546 K

d) 100. mL, 1.0 atm, 273 K

Which equation represents a physical equilibrium?

a) 1

b) 2

c) 3

d) 4

Which change occurs when the temperature is increased?

a) The equilibrium shifts to the left and the concentration of SO3(g) decreases.

b) The equilibrium shifts to the left and the concentration of SO3(g) increases.

c) The equilibrium shifts to the right and the concentration of SO3(g) decreases.

d) The equilibrium shifts to the right and the concentration of SO3(g) increases.

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