Consider this information about two greenhouse gases, CH4 and N2O. Which statement is correct for CH4? (10) Greenhouse Gas Abundance in Troposphere, % Factor N20 160 3.1 x 10-5 CH4 30 1.8 x 104 CH4 is less effective greenhouse gas and there is less of it in troposphere. )) CH4 is less effective greenhouse gas and there is more of it in troposphere. )) CH4 is less effective green house gas and there is less of it in troposphere. ) CH4 is more effective green house gas and there is more of it in troposphere.

To chill beverages quickly, mix ice and salt and put the cans/bottles in the iced saltwater. The iced saltwater becomes very cold! Is this reaction: NaCl → Na+ + Cl- Endothermic? Or Exothermic? How do you know? It is a endothermic reaction to completely break up salt crystal NaCl (s)>Na+(g) +Cl – (g) DHLattice=788k/mol

A test of an automobile engine exhaust revealed that 3.7g of NO2 was emitted in 10 minutes of operation. How many moles of NO2 would this engine release if it were used for a 45 minute commute, assuming that this measured number is representative of the emission under all circumstances

A car releases 55.0g of CF2Cl2 each month. How much Cl is emitted into the atmosphere by this car in a year ? Show work please

du.co Question 10 of 22 Balance the following chemical equation (if necessary): CH(g) + O,(g) → H,O(g) + CO,(g) 04- 03. 02. O+ O2+ D3+ 04+ 1 4 7 8 9. O3 04 Os + (s) (1) (g) (aq) CO CH.0 H,O Reset • x H,O Delete MacBook Air 80 DII F3 F4 F7 F8 F9 @ $ & 2 4 5 6 8 9 W E R Y S D F G H J K C V B M * CO *3

Use your data to calculate the number of Calories in a 3.4 g sugar cube. (Molecular mass of sugar = 342.2965 g/mol; ΔHcomb sugar = 5639 kJ/mol; 1 Calorie = 1 Kcal)

Try Again Row 3: Your answer is wrong. In addition to checking your math, check that you used the right data and DID NOT round any intermediate calculations. A student runs two experiments with a constant-volume "bomb" calorimeter containing 1100. g of water (see sketch at right). First, a 7.000 g tablet of benzoic acid (CH₂CO₂H) is put into the "bomb" and burned completely in an excess of oxygen. (Benzoic acid is known to have a heat of combustion of 26.454 kJ/g.) The temperature of the water is observed to rise from 15.00 °C to 53.26 °C over a time of 12.3 minutes. Next, 5.420 g of acetylene (C₂H₂) are put into the "bomb" and similarly completely burned in an excess of oxygen. This time the temperature of the water rises from 15.00 °C to 74.42 °C. Use this information, and any other information you need from the ALEKS Data resource, to answer the questions below about this reaction: Is this reaction exothermic, endothermic, or neither? If you said the reaction was exothermic or…

Could someone please help! No plagiarism Please! 3. Draw an or find an image of an endothermic reaction or an exothermic reaction. Explain what makes it the type of reaction you chose to illustrate. Include arrows to show what direction the overall enthalpy of reaction (energy of reaction) flows.    4.  Ammonium nitrate dissolves in water via the following reaction: NH4NO3(s) → NH4+(aq) + NO3-(aq) The bond energies of the compounds in the reaction are as follows: NH4NO3 =   3040 kJ/mol NH4+ = 1564 kJ/mol NO3- = 1009 kJ/mol How much total energy does the reaction have, and how will the environment change when the reaction occurs? Please show all of your work

The enthalpy of combustion of isooctane (C8H18), one of the many hydrocarbons in gasoline is 5.45 × 103 kJ/mol. Calculate the enthalpy change per gram of isooctane and per liter of isooctane (d = 0.688 g/mL).

How many moles of oxygen are required to completely combust 3.7 moles of C6H14? How many grams of carbon dioxide are produced? Identify the type of reaction.