quiz 2b

If you have a gas furnace it is important to make sure that it is tuned up with a proper flow of oxygen. Without a proper flow of oxygen to the furnace, it can burn the natural gas (CH4) with some incomplete combustion. Why can it be so dangerous if your furnace is burning natural gas with incomplete combustion?

The 24 power plants in Baltimore metro area collectively emit about 40,300 metric tons of CO2 per day (www.carma.org), thereby increasing the level of greenhouse gases in this region. To counter this, environmentalists plan to plant trees in the area. How many moles of CO2 are emitted by these power plants every day? (1 ton =1000kg, molecular weight of CO2 is 44g) If on average 500 moles of glucose are synthesized by a tree each day, how many moles of CO2 can a single tree convert to glucose in a single day? How many trees need to be planted to reabsorb all the CO2 released into the atmosphere every day by these power plants? If a single tree occupies an average of 8.00 x 10-5 sq miles, what percent of the area of Baltimore city needs to be forested to counter the CO2 emitted from power plants alone?  (total area of Baltimore city is 92.00 sq miles)

19. The chemical equation for photosynthesis is _CO2 (g) + _H₂O (1)→ __C6H1206 (s) + (C6H12O6 is glucose, the simplest sugar) a. Balance the chemical equation above by filling in the blanks. b. According to onetreeplanted.org, the average tree (across all climates and sizes) removes 10 kg of carbon dioxide from the atmosphere every year. Based on this, what mass of glucose is produced annually by the average tree? O2 (g) c. Teak is a common species of tropical tree. The graph below shows the amount of CO₂ absorbed by teak forests in tons of CO₂ per hectare of forest per year, according to the climate region where the forests are found (dry = low rainfall, humid=high rainfall). Looking at your photosynthesis equation again, what does this data suggest about which reactant is the limiting reactant for teak trees? Explain. C Teak Carbon sequestration rate (tons CO₂ ha -1yr -1) 10 10 20 Tropical humid Tropical dry Aboveground biomass, 0-20 years Belowground biomass, 0 -20 years

Balance the chemical equation. Au + HCI + HNO3→AUCI3 + NO + H20 Assume the coefficient of H20 is 2. What is the balanced equation? DAu +HCI +HNO3-[Auc13 +NO +H20

Enrichment Activity 2. Let's turn up the heat! Directions: Write the combustion reactions of the following organic compounds. 1. Kerosene, C12H26 2. Cyclopropanol, C3H60 3. C4H9OH 4. C5H12 5. Isopropyl Alcohol

1. If the animal population decreased, the amount of atmospheric carbon would:      A-increase   B-decrease   C-stay the same   2.Which of the following would help the most to fight the current processes that are shifting Earth's climate?       A-reduction of atmospheric oxygen   B-increase in atmospheric nitrogen   C-reduction in atmospheric carbon   D-increase in atmospheric carbon   3.Which of these processes produces carbon dioxide?    A-photosynthesis   B-burning of fossil fuels   C-animal perspiration   D-planting trees       4. What will be the most immediate effect if many trees are cleared by deforestation?    A-Decreased use of atmospheric carbon dioxide   B-Increased rates of decomposition   C-Increased production of organic compounds   D-Decreased combustion of fossil fuels   5. Only humans can remove carbon from this carbon sink/reservoir.   A-fossil fuels   B-plants   C-atmosphere   D-animals     6. When humans…

Form a hypothesis that might explain which season is CO2 concentration the highest and which season the lowest and write a brief description explaining why it is the way it is. Hint: Plant photosynthesis reduces the CO2 concentration and decay processes increase

A. if the density of an oil at 60F is about 900 g/l, what is the corresponding API? What will be the value of API at 50°C? B. assume that you were asked to select either A (CH4) or C60H75 to be used as energy source taking into consideration the emission of CO2 for both, which one will be your candidate as a safer one (with respect to CO2 emissions) if the quantity of the released energy for the second material is assumed doubled? C. Suppose that a certain fraction of the power produced by a 350 MW coal plant is offset by wind power. Assume that when the coal plant runs at its constant rated power it has an efficiency of 37%, but that when it needs to be ramped up and down to compensate for the wind power variations its efficiency is reduced by according to e = 0.37 -0.00001p², at what p the efficiency is maximum? Signature Head of Department I need a clear answer by hand.

Match the carbon reservoir exchange with the chemical equation that occurs: 1.                                                 atmosphere-rock exchange 2.                                                 atmosphere-ocean exchange 3.                                                 atmosphere-biosphere exchange A. CO2 + H2O + sunlight → CH2O + O2 B. CO2 + H2O → H2CO3 C. CaSiO3 + CO2 → CaCO3 + SiO2

How organisms affect crustal abundances of elements, especially oxygen, carbon, calcium, and some transition metals; the onset of oxidation as an energy source

A student wants to know how many grams of water are made from 5.00 grams of oxygen gas during the synthesis of water from basidelements. Which step should be substituted for the question marks? 2 Hz+ O2→2 H;0 5.0 g 02 1.0 moles 0, 1 31.998 g 02 18 g H,0 A. 1.0 mole 0, 2.0 mole H,0 B. 1.0 mole 0, 18 g H,0 C. 2.0 mole H,O 2.0 mole 0 D. 2.0 mole H, O

2. Calculate the minimum amount of air required for the complete combustion of 150 kgs of fuel containing 70 % Carbon, 15 % hydrogen, 5 % sulfur and the rest nitrogen by weight.

7. Write balanced equations for each of the following by inserting the correct coefficient in the blanks. OsH + 1DsM HOsM ZrO2(s) + HF() – ZFF4(s) + a. -> b. Na20(s) + H2O(1) → _ NaOH(aq) + O2(g) Al2O3(s) + SKCH COO →__ NaOH(aq) – NasAIO3(aq) + H2O(1) С.

NEED HELP!   When potassium metal is placed in water, a large amount of energy is released as potassium hydroxide and hydrogen gas are produced in the reaction 2K(s) + 2H2O(l) → 2KOH(aq) + H2(g). Your lab partner says this is a redox reaction and a combustion reaction. Do you agree? Defend your answer by explaining whether or not it meets the requirements of each type of reaction.

15. Carbon dioxide makes up approximately 0.04% of Earth's atmosphere. If you collect a 2.0-L sample from the atmosphere at sea level (101.33 kPa) on a warm day at 27 °C, how many CO2 molecules are in your sample? * a. 5 x 10^20 b. 5 x 10^21 O c. 5x 10^22 d. 5 x 10^23

Write the combustion reaction of C6H14+O2—->CO2+H2O

Carbon dioxide emissions associated with a one-night stay in a hotel room are calculated at 29.53 kg of CO2 per room day for an average hotel. The 200 rooms of your hotel are all occupied for two days during a college football game. How much CO2 did the guests and hotel release into the atmosphere?

How many grams of O 2 are required to burn 46.0 grams of C 5H 12?     C 5H 12 + 8O 2 --> 5CO 2 + 6H 2O with complete solution

5. Consider the following equation: 2C2H6 + O2 -> 4CO2 + 6H2O When .004 moles of C2H6 are burned the number of moles of CO2 produced will be?

Are side products/by products the same thing as minor products in a chemical reaction?

Which process directly adds carbon into the atmosphere? CO2 OA. increasing plant populations OB. decreasing animal populations OC. burning fossil fuels forming sedimentary rock OD -0044 jpg

The breathalyzer test utilizes the reaction between the dichromate ion and ethanol to produce acetic acid. Balanced equation for this process is given below. How much acetic acid can be produced from a mixture containing an excess of dichromate ion and 5.66 x 10g of ethanol? 16H* + 2Cr,0,2- + 3CH,CH,OH – 3CH3COOH + 4Cr** + 11H,0 Enter your answer in the provided box. g CH3COOH 7 of 10 Next > < Prev

Identify the reaction type for reactions #1, #2, and #3. Large Element Element #: %232: Hydrocarbon punodwo) B. CO2(g) (6)2) Element → CO, Large Element (6)o°H + +. # 3: B. punodwom Tap below to toggle through answer options and to identify the reaction type for each of the three reactions. The type of reaction for Reaction #1 The type of reaction for reaction for The type of Reaction #2 Reaction # 3 is Decomposition Combustion Tap here to select answer. +.

How increase in atmospheric CO2 impact ocean acidification?

The chart shows average CO2 emissions for fossil fuel vehicles (gasoline, diesel, and hybrid gas‑electric), as well as electric vehicles. The ordinate is mg CO2 per mile driven per pound mass of the vehicle (called curb weight). For electric vehicles, CO2 emission varies in U.S. states because of the mix of fuels used to generate electricity. If electricity came entirely from solar power, there would be little CO2 associated with its production. California has the lowest CO2 emission for producing electricity and Ohio has the highest because it depends heavily on coal‑fired power plants. The chart does not include CO2 emission from manufacturing vehicles. When normalized for distance driven by each kind of vehicle before it is scrapped, CO2 emission associated with manufacturing electric vehicles is estimated to be 25–75% greater than CO2 emission associated with manufacturing gasoline and diesel vehicles. If manufacturing were included, CO2 emission associated with electric vehicles…

Calcium carbonate is a chemical compound found in rocks. When heat is applied it breaks down into CaCO3 --------> CaO + CO2 Which statement below is true? This is an endergonic synthesis reaction. This is an exergonic synthesis reaction. O This is an endergonic decomposition reaction. This is an exergonic decomposition reaction.

A. How CO2 be converted value-added products mediated by ionic liquids such as CO2 hydrogenation, HCOOH, CH4 and other hydrocarbons, HCOOCH3 and can to carbonates etc. B. What are biocompatible ionic liquids and their application in pharmaceutics?

1. balanced chemical equation for the single replacement of Li + H2O-----> 2. balanced chemical equation for the single replacement of Na + H2O-----> 3. balanced chemical equation for the single replacement of K + H2O----->

Below are described three methods through which breads are leavened (risen). Which of them are chemical changes? 1. Yeast breads: Yeast added to flour and water digests carbohydrates from the flour and produces carbon dioxide (CO2) which forms bubbles in the flour water mixture. 2. Quick Breads: Flour, water, baking soda (NaHCO3) and a source of acid, are mixed and baked. The baking soda interacts with acids and heat in the batter to release carbon dioxide (CO2) gas, forming bubbles in the mixture. 3. Flat Breads: A mixture of flour and water are exposed to high heat, causing the water to evaporate quickly, forming bubbles in the mixture.   A)yeast breads B)quick breads C)flat breads D)yeast breads and quick breads E)quick breads and flat breads

Consider the gas-phase reaction of ethylene (CH 2 CH 2) with hydrogen to form ethane (C 2H 6), which occurs in the presence of a palladium catalyst (Section 6.4B). a. Write the expression for the equilibrium constant for this reaction. b. If ΔH = −28 kcal/mol, are the products or reactants higher in energy? c. Which is likely to be true about the equilibrium constant for the reaction: K > 1 or K < 1? d. How much energy is released when 20.0 g of ethylene reacts? e. What happens to the rate of the reaction if the concentration of ethylene is increased? f. What happens to the equilibrium when each of the following changes occurs: [1] an increase in [H 2]; [2] a decrease in [C 2H 6]; [3] an increase in temperature; [4] an increase in pressure; [5] removal of the palladium catalyst?

2. Based on what you have learned so far, why is it necessary to stir the water and wait until the end of the video to read the dissolved oxygen? The stirring aerates the water, causing the oxygen to dissolve more easily in the water. The stirring causes oxygen molecules to leave. The stirring causes the H20 to break apart and release oxygen. The stirring causes hydrogen gas to mix with oxygen gas making water.