Laboratory Exercise - Sustainable Practices (1)

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 following chemical equation by placing a coefficient (including 1) in each answer box that is in front of each reactant and each product. While coefficients that are equal to 1 are not placed in front of either a reactant or product, you MUST include any coefficient that is equal to 1 in this problem. type your answer... C₂H12 + type your answer... 2 type your answer... CO₂ + type your answer... H₂O

Describe what is happening Reactants combine into a large one Reactant breaks apart into smaller molecules A pure element swaps places with an element in a compound elements from two different compounds switch place a hydrocarbon reacts with oxygen to form carbon dioxide and water 4Cr + 30, --> 2Cr,O3 identify

9. Furnaces in residential homes usually burn natural gas, which is mostly methane, CH. Here is the balanced equation for the complete combustion of methane: CH+20₂ → CO₂ + 2H₂O a. Explain why it is important to make sure your furnace is serviced and in proper working order before the winter. Be sure to include information about combustion reactions in your answer.

4Cr + 30, --> 2Cr,O3 Describe what is happening Reactants combine into a large one Reactant breaks apart into smaller molecules A pure element swaps places with an element in a compound elements from two different compounds switch place O a hydrocarbon reacts with oxygen to form carbon dioxide and water

* Question Completion Status: QUESTION 15 How many grams of hydrogen are needed to produce 1.80 g of water according to this equation? [SHOW YOUR WORK FOR THIS PROBLEM] 2H 2(g) + O 2(g)→ 2H 20( g) O 0.201 g O 2.01 g O 4.02 g O 0.100 g O 0.180 g Save All Answers Click Save and Submit to save and submit. Click Save All Answers to save all answers. 28 P Type here to search hp

Suppose a pair of chemical compounds A and B can react in two different ways: A+B C Reaction 1 gives product C. A+B D →> Reaction 2 gives product D. The following facts are known about the two reactions: • Reaction 1 is endothermic and Reaction 2 is exothermic. • If a reaction vessel is charged ("filled") with A and B, then at first C is produced faster than D. Use these facts to sketch a qualitative reaction energy diagram for both reactions. Note: because these sketches are only qualitative, the energies don't have to be exact. They only have to have the right relationship to each other. For if one energy is less than another, that fact should be clear in your sketch. energy A + B Reaction 1 reaction coordinate energy A + B Reaction 2 reaction coordinate ☑

Remalning Time: 1 hour, 28 minutes, 18 seconds. * Question Completion Status: QUESTION 4 For the following question(s), consider the following balanced equation. Mg 3N 2( S) + 6H 20(1) → 3Mg(OH) 2( s) + 2NH 3( g) When 2.50 mol of Mg 3N 2 are allowed to react, how many moles of H 20 also react? [SHOW YOUR WORK FOR THIS PROBLEM] 15.0 mol 2.50 mol O 9.00 mol O 6.00 mol O 1.25 mol QUESTION 5 Click Save and Submit to save and submit. Click Save All Answers to save all answers. Save All Ar Type here to search 28

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.                   Source                  StylesFormat

11a, 11c and 12c

Explain this for me with an answer, I dont understand it