Chemistry 6

What is the wavelength of a photon having a frequency of 1.65 x 1015 Hz? (c = 3.00 × 108 m/s, h = 6.63 × 10-34 J · s, 1 m = 109 nm) 181 nm 1.09 x 10-9 nm .328 5.5 x 10-2 nm 1.21 x 10-31 nm

181 nm

1.Oxidation-reduction reactions always form gaseous products. 2.At least one substance is oxidized and one substance is reduced in an oxidation-reduction reaction. 3.The species that is oxidized loses one or more electrons in an oxidation-reduction reaction. 1) 1 only 2) 2 only 3) 3 only 4) 1 and 3 5) 2 and 3

2 and 3

Which of the following statements concerning the limiting reactant is/are correct? 1.The mass of the limiting reactant is the always the lowest mass of all reactant masses. 2.The theoretical yield depends on the amount of limiting reactant. 3.The moles of limiting reactant is always the lowest moles of all reactants. 1) 2 only 2) 3 only 3) 1 and 3 4) 2 and 3 5) 1, 2, and 3

2 only

What is the percentage by mass of hydrogen in the insecticide Lindane, C6H6Cl6? 1) 2.08 % 2) 47.2 % 3) 20.0 % 4) 1.20 % 5) 8.80 %

2.08%

What is the frequency of a photon having a wavelength of 141.8 nm?

2.12x10^15 Hz

A particular gas exerts a pressure of 4.79 atm. What is this pressure in units of mmHg? 1) 4.85 mmHg 2) 3.69 x 103 mmHg 3) 4.73 mmHg 4) 6.30 x 10-3 mmHg 5) 3.64 x 103 mmHg

3.64 x 103 mmHg

How many molecules are there in 192 g of citric acid, C6H8O7? 1) (6.02 x 1023) / 192 2) 6.02 x 1023 3) 96.0 4) 192 x (6.02 x 1023) 5) 192

6.02 * 10^23

How many molecules are there in 90.0 g of butylene glycol, HO(CH2)4Oh

6.02&10^23

What is the molecular mass of cycloheptane, C7H14? 1) 98.19 amu 2) 26.12 amu 3) 1191.19 amu 4) 13.02 amu 5) 85.08 amu

98.19 amu

The formula for aluminum fluoride is

AlF3

What is the molarity of an NaI solution that contains 7.3 g of NaI in 28.0 mL of solution? 1) 0.0038 M 2) 1.7 M 3) 0.049 M 4) 0.00019 M 5) 0.26 M

1.7 M

In today's lab, the neutralization reaction can be classified as a(n) ___________ reaction. exothermic catalyzed biological endothermic slow

exothermic

Which of the following compounds is insoluble in water? 1) (NH4)2CO3 2) K2CO3 3) FeCO3 4) Li2CO3 5) Na2CO3

FeCO3

How many moles of silver are contained in 7.00 3g of silver?

0.065 mol

How many moles of iron atoms are contained in 4.39 g of iron? 1) 0.122 mol 2) 0.0579 mol 3) 0.0786 mol 4) 0.169 mol 5) 245 mol

0.0786 mol

A 29.0 g sample of NaOH is dissolved in water, and the solution is diluted to give a final volume of 1.6 L. The molarity of the final solution is

0.453M

Which of the following is/are true about electromagnetic radiation? 1.Wavelength is inversely proportional to frequency 2.Frequency has units of s-1 of Hz 3.Waves of different wavelengths travel at different speeds

1 and 2

Which of the following statements is incorrect? 1.As the energy of a photon increases, its frequency decreases. 2.The product of wavelength and frequency of electromagnetic radiation is a constant. 3.As the wavelength of a photon increases, its frequency decreases. 4.As the wavelength of a photon increases, its energy decreases. 5.As the frequency of a photon increases, its wavelength decreases.

As the energy of a photon increases, its frequency decreases.

Which of the following is not a postulate of the kinetic molecular theory of gases?

At a constant temperature, each molecule has the same kinetic energy

Which of the following is a strong base in aqueous solution? 1) NH3 2) HOCH2CH2OH 3) H3PO4 4) HI 5) Ba(OH)2

Ba(OH)2

Identify the spectator ion(s) in the following reaction.Cu(OH)2(s) + 2H+(aq) + 2Cl-(aq)--> Cu2+(aq) + 2Cl-(aq) + 2H2O(l) 1) Cu2+ and Cl- 2) Cl- 3) H+ and Cl- 4) Cu2+ 5) Cu(OH)2

Cl-

Which of the following is included as a postulate in the kinetic molecular theory of an ideal gas? 1) In an average collision between molecules, both molecules have the same kinetic energy. 2) All the molecules have the same velocity. 3) All molecules move randomly in zigzag directions. 4) Collisions between molecules are all elastic. 5) The distance between gas molecules is small compared with the size of the molecule.

Collisions between molecules are all elastic.

Which of the following statements is not true about the element calcium? 1) It has chemical and physical properties most similar to silver. 2) It is in period 4. 3) It is an alkaline earth metal. 4) It is a metal. 5) It is in group IIA (group 2).

It has chemical and physical properties most similar to silver.

The formula of magnesium sulfide is 1) MgSO4. 2) MgSO3. 3) MgSO2. 4) Mg(SO4)2. 5) MgS.

MgS

For an ideal gas, which of the following statements is true?

P is inversely proportional to V at a constant n and T

In today's lab, Zinc metal will be reacted with ____________ to generate H2 gas. 1) a metal 2) an acid 3) a nonmetal 4) a base 5) a gas

an acid

The species Au+, Mg2+, and V3+ are all 1) allotropes. 2) isoelectronic. 3) isotopes. 4) cations. 5) anions.

cations

The volume of 1 mol of nitrogen 1) has the value of 22.4 L at 0°C and 1.00 atm. 2) is decreased by decreasing the pressure of the gas. 3) is lower than that of 1mol ammonia at high pressures. 4) is increased by decreasing the temperature. 5) is decreased by increasing its kinetic energy.

has the value of 22.4 L at 0°C and 1.00 atm.

If q = 60 kJ for a certain process, that process requires a catalyst. is endothermic. cannot occur. occurs slowly. is exothermic.

is endothermic.

The energy associated with the motion of molecules in a gas is called _____. internal energy potential energy heat kinetic energy temperature

kinetic energy

In today's lab, __________ and ___________ will be measured for a gas (air). 1) pressure, temperature 2) pressure, volume 3) moles, volume 4) temperature, volume 5) moles, pressure

pressure, volume

In part 1. of today's lab, the student will be separating a(n) _________ mixture. 1) chemical 2) metal 3) physical 4) ionic 5) salt water

salt water

The internal energy of a substance is defined as

the sum of the potential and kinetic energy of all particles which make up the substance.

In today's lab, ________ will be used to separate the product from the reaction mixture. 1) heating 2) vacuum filtration 3) gravity filtration 4) separation 5) cooling

vacuum filtration

In today's lab, ________ will be used as a reactant for the source of zinc in the reaction. 1) zinc hydrate 2) zinc hydride 3) zinc metal 4) zinc sulfate 5) zinc carbonate

zinc metal