Chemistry Questions

Under which conditions of temperature and pressure would a sample of H2(g) behave most like an ideal gas?(1) 0°C and 100 kPa(2) 0°C and 300 kPa(3) 150°C and 100 kPa(4) 150°C and 300 kPa
1 Answers
When 50. milliliters of an HNO3 solution isexactly neutralized by 150 milliliters of a 0.50 Msolution of KOH, what is the concentration ofHNO3?(1) 1.0 M (3) 3.0 M(2) 1.5 M (4) 0.5 M
2 Answers
What is the total number of electrons in a Cu+ ion?(1) 28 (3) 30(2) 29 (4) 36
2 Answers
Which statement correctly describes the charge of the nucleus and the charge of the electron cloud of an atom?(1) The nucleus is positive and the electron cloud is positive.(2) The nucleus is positive and the electron cloud is negative.(3) The nucleus is negative and the electron cloud is positive.(4) The nucleus is negative and the electron cloud is negative.
2 Answers
Which compound becomes less soluble in water as the temperature of the solution is increased?(1) HCl (2) KCl (3) NaCl (4) NH4Cl
2 Answers
A temperature of 37°C is equivalent to a temperature of(1) 98.6 K (3) 310. K(2) 236 K (4) 371 K
2 Answers
A 1.0-gram piece of zinc reacts with 5 milliliters of HCl(aq). Which of these conditions of concentration and temperature would produce thegreatest rate of reaction?(1) 1.0 M HCl(aq) at 20.°C(2) 1.0 M HCl(aq) at at 40.°C(3) 2.0 M HCl(aq) at at 20.°C(4) 2.0 M HCl(aq) at at 40.°C
1 Answers
What is the chemical formula for sodium sulfate?(1) Na2SO3 (3) NaSO3(2) Na2SO4 (4) NaSO4
1 Answers
Which element has both metallic and nonmetallic properties?(1) Rb (3) Si(2) Rn (4) Sr
2 Answers
The nucleus of an atom of K-42 contains(1) 19 protons and 23 neutrons(2) 19 protons and 42 neutrons(3) 20 protons and 19 neutrons(4) 23 protons and 19 neutrons
2 Answers
Two substances have different physical and chemical properties. Both substances havemolecules that contain two carbon atoms, one oxygen atom, and six hydrogen atoms. These two substances must be(1) isomers of each other(2) isotopes of each other(3) the same compound(4) the same hydrocarbon
2 Answers
Subatomic particles can usually pass undeflected through an atom because the volume of an atom is composed of(1) an uncharged nucleus(2) largely empty space(3) neutrons(4) protons
2 Answers
Which substance, when dissolved in water, forms a solution that conducts an electric current?(1) C2H5OH (3) C12H22O11(2) C6H12O6 (4) CH3COOH
1 Answers
How are HNO3(aq) and CH3COOH(aq) similar?(1) They are Arrhenius acids and they turn blue litmus red.(2) They are Arrhenius acids and they turn red litmus blue.(3) They are Arrhenius bases and they turn blue litmus red.(4) They are Arrhenius bases and they turn red litmus blue.
1 Answers
An iron bar at 325 K is placed in a sample of water. The iron bar gains energy from the water if the temperature of the water is(1) 65 K (3) 65°C(2) 45 K (4) 45°C
2 Answers
In which type of chemical reaction do two or more reactants combine to form one product, only?(1) synthesis(2) decomposition(3) Single replacement(4) double replacement
2 Answers
Which group of nuclear emissions is listed in order of increasing charge?(1) alpha particle, beta particle, gamma radiation(2) gamma radiation, alpha particle, beta particle(3) positron, alpha particle, neutron(4) neutron, positron, alpha particle
2 Answers
Which balanced equation represents an endothermic reaction?(1) C(s) + O2(g) → CO2(g)(2) CH4(g) + 2O2(g) → CO2(g) + 2H2O(l)(3) N2(g) + 3H2(g) → 2NH3(g)(4) N2(g) + O2(g) → 2NO(g)
2 Answers