Earth's Atmosphere
Human Activities And Earth's Atmosphere
Earth's Water
Human Activities and Earth's Water
Green Chemistry
100

The Four Regions of The Atmosphere

What are the Troposphere, Stratosphere, Mesosphere, and Exosphere?

100

Known or Possibly Naturally Occurring Sources For NO

What are automobiles?

100

Freshwater that is under the soil

What is groundwater?

100

The definition of DO and why it is important

What is the amount of oxygen dissolved in water and that it is important for the survival of marine organisms?

100

How does the principle that it is better to use as few steps as possible in making new chemicals relate to energy efficiency?

What is the fact that the fewer steps in a process, the less waste is generated, and processes with fewer steps require less energy at the site of the process and for subsequent cleanup or disposal of waste?

200

The Primary Basis for The Division of The Atmosphere Into Different Regions

What Is The Temperature Profile?

200

Known or Possibly Naturally Occurring Sources For SO2

What are coal power plants that produce coal and oil?

200

A layer of rock that holds groundwater

What is an aquifer?

200

two most common methods of purifying water

What are reverse osmosis and distillation?

200

How do catalysts make processes more energy efficient?

What is lowering the activation energy?

300

The Difference Between Photodissociation and Photoionization, and Also The One that Requires More Energy

What is the cleavage of a bond such that two neutral species are produced vs. absorption of a photon with sufficient energy to eject an electron, producing an ion and the ejected electron, respectively? Does Photoionization require more energy?

300

The Chemical Forms In Which Chlorine Exists In The Stratosphere Following Cleavage Of The Carbon-Chlorine Bond

What are Cl and ClO?

300

How is the pH of the ocean going to change overtime

What is decreasing?

300

steps of wastewater treatment

What is Screening, Sedimentation, Biological Treatment, Filtration, and Disinfection?

300

Is a chemical process greener when the reaction occurs at 500K or 1000K?

What is the reaction at 500K?

400

Info: The Dissociation Energy Of A Carbon-Bromine Bond Is Typically About 210 KJ/mol.

The Maximum Wavelength Of Photons That Can Cause C-Br Bond Dissociation

What is 570 nm?

400

Why Increasing Concentrations of CO2 In The Atmosphere Affect The Quantity of Energy Leaving the Earth, But Do Not Affect The Quantity of Energy Entering From the Sun

What are incoming and outcoming energies that are in different regions of the electromagnetic spectrum?

400

What is the molarity of Na+ in a solution of NaCl whose salinity is 5.6 if the solution has a density of 1.03 g/mol?

What is 0.099 M?

400

the property that determines whether an ion will contribute to water hardness

What is divalent?

400

Is a chemical process greener when benzene is a solvent or when water is a solvent?

What is the process when water is a solvent?

500

Info: The Average Concentration of Carbon Monoxide in the air in an Ohio City in 2006 was 3.5 ppm.

The Number of CO Molecules in 1.0 L of This Air at a Pressure of 759 torr and a Temperature of 22 Degrees Celcius (make sure to use units)

8.6 x 10^(16) CO Molecules/1.0 L air

500

The Reason That Flourine Present In Chloroflourocarbons Not A Major Contributor To Depletion of The Ozone Layer

What is the C-F bond that requires more energy for dissociation than the C-Cl bond?

500

A first-stage recovery of magnesium from seawater is precipitation of Mg(OH)2 with CaO: Mg2+(aq) + CaO(s) + H2O(l) → Mg(OH)2(s) + Ca2+ (aq). What mass of CaO, in grams, is needed to precipitate 1000 lb of Mg(OH)2?

What is 4.361x10^5 g CaO?

500

How many moles of Ca(OH)2 and Na2CO3 should be added to soften 1200 L of water in which [Ca2+] = 5.0 x 10^-4 M and [HCO3-] = 7.0 x 10^-4 M?

What is 0.42 mol of Ca(OH)2 and 0.18 mol Na2CO3?

500

Is a chemical process greener when there is sodium chloride as a by-product or chloroform (CHCl3) as a by-product?

What is the reaction with sodium chloride as a by-product?

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