Using interpolation, as we did in the lab on density of water, which of the following would represent an appropriate burette reading?

The visible fog above the dry ice in the states of matter lab was composed of what?

Which of the following observations casts STONGEST doubt on the hypothesis that the visible fog above the dry ice in the states of matter lab was composed of gaseous CO2?

WHEN THE COLLER CONTAINING THE DRY IVE WAS OPENED, THERE WAS LITTLE OR NO FOG VISIBLE ABOVE THE DRY ICE

Which of the following is true about the scientific method?

WHEN POSSIBLE, SCIENTISTS SUBJECT EVEN HIGHLY PLAUSIBLE HYPOTHESES TO EMPIRICAL TESTING

Which of the following is an alkali metal that will react vigorously with water?

POTASSIUM

What is the charge on a lithium ion containing 3 protons and 2 electrons?

Nitrogen has the atomic number 7. How many electrons does an electrically neutral atom of nitrogen have?

One of the isotopes of nitrogen is nitrogen-15. How many protons are there in the nucleus of nitrogen-15?

One of the isotopes of nitrogen is nitrogen-15. How many electrons are there in an electrically neutral atom of nitrogen-15?

What was the name of the element referred to as the “T-Rex of the chemical elements” in the film “The Periodic Table”?

If the name of an ion ends in “ide” what charge will it have?

The compound ammonium chloride, produced by the reaction of gaseous ammonia and hydrogen chloride gas, has the formula-

To be a free radical, a chemical species MUST have

AT LEAST ONE UNPAIRED ELECTRON

T/F: A molecule of the polymer called “polyethylene” contains about half as many double bonds as it does carbon atoms

What information might not be obtained by looking at a structural formula?

THE SHAPE OF THE MOLECULE (ANGLES OF THE BONDS)

The SI base unit for length is

The SI unit for mass is

Which of these is the balanced chemical equation for the formation of hydrogen gas as performed in the “States of Matter” laboratory?

2HCL(AQ)+ZN(S) à H₂(G)+ZNCL₂(AQ)

The atmosphere contains about 78% nitrogen, which is transparent and colorless. This well-established datum casts doubt on the hypothesis of what?

THAT THE CLOUD SEEN ABOVE THE LIQUID NITROGEN IS NITROGEN GAS

The hypothesis (an incorrect one, as it turns out) that dry ice sublimes as it “warms up to room temperature” could be tested by doing what?

MEASURING THE TEMP OF THE DRY ICE WITH A THERMOMETER AS SUBLIMATION OCCURS

Suppose a vibrating slinky is vibrating with a  wavelength of 14M and a frequency of 1/s/ Then the slinky is excited more vigorously so that the frequency is now 2/s. What is the new wavelength with the new frequency of 2/s?

If the mass of a sample of water is measured as 2.01G, to the nearest 0.02G, then the relative uncertainty in the measurement is

The rules for significant figures when measurements are multiplied or divided are based on the effects of-

RELATIVE UNCERTAINTIES IN THE MEASUREMENT

The rules for significant figures when measurements are added or subtracted are based on the effects of-

THE ABSOLUTE UNCERTAINTIES IN THE MEASUREMENT

If the mass of a 2.22ML sample of solution is measured as 2.58G, its density would best be reported as

A chemical bond formed by the sharing of a pair of electrons is

A COVALENT BOND

Breaking chemical bonds always

REQUIRES ENERGY

Forming chemical bonds always

The reaction H₂à H+H (WHAT HAPPENS TO THE ENERGY?)

The reaction H₂à H+H (ENDERGONIC OR EXERGONIC)

What kind of radiation is of longer wavelength than visible light, causes molecules to vibrate more vigorously, and is absorbed by some molecules in the atmosphere?

What kind of radiation is very short in wavelength, is highly penetrating, causes ionization of the matter that it passes through, and is produced by changes within the atomic nucleus?

Which of the following colors of light has the longest wavelength?

Which of the following reactions requires UV radiation, and therefore can only occur during the daytime?

CLOOCL  à CLOO+CL

In the original mechanism proposed by Rowland and Molina:

CL+03 à CLO+O2

CLO+O à CL+O2

Which species is the catalyst?

Which of the following events PERMANENTLY removes catalytically active chlorine from the stratosphere?

MIGRATION OF HCL MOLECULES BACK INTO THE TROPOSPHERE, WHERE THEY ARE RAINED OUT DOWN TO EARTH

CFC’s

CARRY CHLORINE ATOMS INTO THE STRATOSPHERE, WHERE THE CHLORINE IS THEN RELEASED AND BEGINS TO DESTROY OZONE.

The step CL+O3 à CLO+O2

IS COMMON TO BOTH OF THE MAJOR PROPOSED MECHANISMS FOR DESTRUCTION OF STRATOSPHERIC OZONE BY CHLORINE

Oxides of nitrogen

CONTRIBUTE TO DEPLETION OF STRATOSPHERIC OZONE AND INCREASE IN TROPOSPHERIC OZONE.

Visible light cannot break up ozone

BECAUSE IT (THE VISIBLE LIGHT) DOESN’T HAVE ENOUGH ENERGY PER PHOTON

Ozone can

ACT AS AN OXIDIZING AGENT

In the spectroscopy lab, Dr. Carter’s shirt appeared red when illuminated by the flame from the air-starved Bunsen burner. It looked black when illuminated by the flame emission from the sodium atoms. What was the reason for this?

THERE WAS NO RED LIGHT FOR THE SHIRT TO REFLECT, SINCE THE SODIUM EMITTED YELLOW, WHICH THE SHIRT ABSORBED.

What allotropes of oxygen absorb the band of ultraviolet radiation from 242NM to 320NM?

ONLY OZONE

The flame emission color for copper was

For which of the following elements did the visible spectrum have both:

The greatest number of visible lines overall AND

The greatest number of visible lines in the long-wavelength region of the visible spectrum?

The reaction NO2àNO+O

CAN AND DOES OCCUR IN THE TROPOSPHERE

High density polyethylene differs from low density polyethylene because