June 2019 Chemistry Regents Questions 41-50 Question Preview (ID: 59731)

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What is the amount of heat absorbed when the temperature of 75 grams of water increases from 20.°C to 35°C?

a) 1100 J

b) 4700 J

c) 6300 J

d) 11000 J

Which sample of HCl(aq) reacts at the fastest rate with a 1.0-gram sample of iron filings?

a) 10. mL of 1 M HCl(aq) at 10.°C

b) 10. mL of 1 M HCl(aq) at 25°C

c) 10. mL of 3 M HCl(aq) at 10.°C

d) 10. mL of 3 M HCl(aq) at 25°C

Which statement describes the concentration of the two gases in this system?

a) The concentration of N2O4(g) must be less than the concentration of NO2(g).

b) The concentration of N2O4(g) must be greater than the concentration of NO2(g).

c) The concentration of N2O4(g) and the concentration of NO2(g) must be equal.

d) The concentration of N2O4(g) and the concentration of NO2(g) must be constant.

Which change will cause the equilibrium to shift to the right?

a) adding a catalyst

b) adding more PCl3(g)

c) increasing the pressure

d) increasing the temperature

A chemical name for this compound is

a) pentanone

b) 1-pentanol

c) 1-pentanamine

d) pentanamide

This compound is classified as an

a) aldehyde

b) alkene

c) alkyne

d) alcohol

Which equation represents fermentation?

a) C2H4 + H2O → CH3CH2OH

b) C2H4 + HCl → CH3CH2Cl

c) C6H12O6 → 2CH3CH2OH + 2CO2

d) 2CH3CHO → C3H5CHO + H2O

The oxidation number of copper changes from

a) +1 to 0

b) +2 to 0

c) +2 to +1

d) +6 to +3

According to one acid-base theory, the two H donors in the equation are

a) CH3COOH and H2O

b) CH3COOH and H3O+

c) CH3COO- and H2O

d) CH3COO- and H3O+

Which nuclear equation represents a spontaneous decay?

a) 1

b) 2

c) 3

d) 4

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