June 2017 Chemistry Regents Questions 41-50 Question Preview (ID: 59814)

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Which particle diagram represents one substance in the gas phase?

a) 1

b) 2

c) 3

d) 4

When the concentration of H 2(g) is increased by adding more hydrogen gas to the container at constant temperature, the equilibrium shifts

a) to the right, and the concentration of HI(g) decreases

b) to the right, and the concentration of HI(g) increases

c) to the left, and the concentration of HI(g) decreases

d) to the left, and the concentration of HI(g) increases

Which diagram represents the potential energy changes during an exothermic reaction?

a) 1

b) 2

c) 3

d) 4

Which compound is classified as an ether?

a) CH3CHO

b) CH3OCH3

c) CH3COCH3

d) CH3COOCH3

Which formula represents the H acceptor in the forward reaction?

a) HCO3-(aq)

b) H2O(ℓ)

c) H2CO3(aq)

d) OH-(aq)

What is the mass of an original 5.60 gram sample of iron-53 that remains unchanged after 25.53 minutes?

a) 0.35 g

b) 0.70 g

c) 1.40 g

d) 2.80 g

The particle represented by X is

a) 1

b) 2

c) 3

d) 4

Fission and fusion reactions both release energy. However, only fusion reactions

a) require elements with large atomic numbers

b) create radioactive products

c) use radioactive reactants

d) combine light nuclei

Which phrase describes the two forms of phosphorus?

a) same crystal structure and same properties

b) same crystal structure and different properties

c) different crystal structures and different properties

d) different crystal structures and same properties

Which graph shows the relationship between pressure and Kelvin temperature for an ideal gas at constant volume?

a) 1

b) 2

c) 3

d) 4

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