QUESTION 7Waking fast can consume 50keal per minute Hor many hours of eercbe are required to consume 450 kcal, the energy in a large candy bar?OA 125O8175heOC75OD15OE1QUESTION 8Which of the lellwing does not have a unom composition troughout?OA CompoundOB Heterogeneous matureOC Homogeneous midureOD ElementOE SolventClick Save ond Sumit to save and submit. Click Sene All Ansers to pae dil anrs

It's a multiple question type. Given information, Ques 7) Energy consume in 1 minute = 5 kcal Ques…

Answered: QUESTION 7 Waking fast can consme…

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter8: Thermochemistry

Section: Chapter Questions

Problem 63QAP: Butane gas, C4H10, is sold to campers as bottled fuel. Its density at 25C and 1.00 atm is 2.38 g/L....

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You place 5.82 g of a liquid PEG sample at 20.5 oC into a thermally-insulated container having 54.7 g water at the same temperature, and record the final equilibrium (plateau) temperature 44.9 oC. The specific heat of water is 1.00 cal/g/oC and the specific heat of PEG is 0.498 cal/g/oC. Calculate the hydration energy (heat of hydration) for PEG in units of kcal/g (careful!). Enter the value (do not enter units) to 3 significant figures.
solve for the gravemetric factor of the following: Substance weighed: Fe2O3 Substance sought: K3Fe(CN)6
5.25 grams of baking soda (NaHCO3) and excess vinegar were combined (reaction below).NaHCO3 (s) + CH3COOH (aq) NaCH3COO (aq) + H2O (l) + CO2(g) a.How many moles of CO2gas areproduced? Hint: use mole ratio. b.Whatvolume of CO2gas is produced when the reaction takes place at1.12 atm, 22.85 °C? c.Instead of doing this reaction in an air-conditioned classroom, the same reaction is performed outside on a hot Indiana summer day at 32.22 °C. Will the volume of CO2gas produced increase, decrease, or stay the same?Explain your choice.
Oceanic uptake of carbon dioxide is thus described:CO2 (g) + H2O ⇔ H2CO3, K = [H2CO3]/PCO2 = 3 x 10-2 M atm-1 H2CO3 ⇔ HCO3- + H+, K = [HCO3-][H+]/[H2CO3] = 9 x 10-7 moles/LHCO3- ⇔ CO32 - + H+, K = [CO32 -][H+]/[HCO3-] = 7 x 10-10 moles/LCharge balance equation:[H+] = [OH-] + [HCO3-] + 2[CO32 ] If the CO2 concentration in the atmosphere is 300 ppm, what is the pH of the ocean?
During photosynthesis, plants convert carbon dioxide and water to glucose (C6H12O6) and oxygen gas. a. Is photosynthesis a source or a sink of a GHG? Explain. b. Write and balance the chemical equation for the photosynthesis c. It is estimated that the amount of CO2 sequestered (removed from the air) by an urban tree is 60.0 kg.4 How much glucose can be produced from 60.0 kg CO2 during photosynthesis?
Butane gas, C4H10, is sold to campers as bottled fuel. Its density at 25C and 1.00 atm is 2.38 g/L. What volume of butane gas at 25C and 1.00 atm is required to heat one gallon of water (d=1.00g/mL) from 25C to 98C ? The reaction for the combustion of butane (H f =125.6kJ/mol) is C4H10(g)+132 O2(g)4CO2(g)+5H2O(g)
Using your cars miles per gallon and the miles you drive in 1 week calculate the liters of carbon dioxide you produce when using your car. Compare your miles in February (pre-covid) versus June (post-covid). Assume that your engine combusts at 1.00 atm and 25.0 celsius. Assume that your gasoline is 100% octane (C8H18). You will also need to balance the combustion reaction that occurs in your car engine. You will need to use PV=nRT I think calculations are not correct specially for June. please help 2C8H18+ 25O2→16CO2+18H2O Feb, (pre covid), Miles covered per week=15×7=105 miles So fuel consumed per week=105 miles/30 miles ga =3.5 ga Density of octane=3.18 kg/ga Mass=volume × density Mass of Octane used per week = 3.5 ga x 3.18 kg/ga =11.13 kg Moles of octane in 11.13 kg 11.13 kg/114 kg/k mol =0.097 kmol 2 kmol octan≡16 kmol CO2 0.097 kmol octane =16/2 × 0.097 kmol CO2 0.097 kmol octane = 0.781 kmol CO2 n= 0.781 kmol=781 moles CO2 V=781 mol x 8.314j/k. mol x (25+273)K/1atm x…
Chemical reactionc most comonly do work on their surroundings by a. having gases as reagents only b. Forming neutral solutions from acids and bases c. producing a lot of heat d. forming gas phase products
Holiday cookies rise (get bigger) when baked in the oven at 350oF because: a. sodium aluminum phosphate (Na Al PO4) releases an acid that forms CO2 gas from sodium bicarbonate (Na+ HCO3-) b. the Maillard reaction hydrolyzes wheat gluten in the batter c. yeast ferment sugar (sucrose) in the batter to form CO2 at temperatures above 72oC d. oxygen (O2) is needed to support the growth of lactic acid bacteria added to the batter e. the amount of sucrose sugar added to Holiday cookies could make reindeer fly
Whenever organic matter is decomposed under oxygen-free(anaerobic) conditions, methane is one of the products. Thus,enormous deposits of natural gas, which is almost entirely methane, serve as a major source of fuel for home and industry.(a) Known sources of natural gas can produce 5600 EJ of energy(1 EJ 10^18J). Current total global energy usage is 4.0X10^2 EJper year. Find the mass (in kg) of known sources of natural gas(Hrxnfor the combustion of CH₄=802 kJ/mol).(b) For how many years could these sources supply the world’stotal energy needs?(c) What volume (in ft³) of natural gas, measured at STP, isrequired to heat 1.00 qt of water from 25.0C to 100.0C (d of H₂O= 1.00 g/mL; d of CH₄ at STP =0.72 g/L)?(d) The fission of 1 mol of uranium (about 4X10^4 ft³) in a nu-clear reactor produces 2X10^13 J. What volume (in ft3) of naturalgas would produce the same amount of energy?
Natural gas is very abundant in many Middle Eastern oilfields. However, the costs of shipping the gas to markets inother parts of the world are high because it is necessary toliquefy the gas, which is mainly methane and has a boilingpoint at atmospheric pressure of -164 °C. One possiblestrategy is to oxidize the methane to methanol, CH3OH,which has a boiling point of 65 °C and can therefore beshipped more readily. Suppose that 10.7 * 109 ft3 of methaneat atmospheric pressure and 25 °C is oxidized to methanol.(a) What volume of methanol is formed if the densityof CH3OH is 0.791 g>mL? (b) Write balanced chemicalequations for the oxidations of methane and methanol toCO21g2 and H2O1l2. Calculate the total enthalpy changefor complete combustion of the 10.7 * 109 ft3 of methanejust described and for complete combustion of the equivalentamount of methanol, as calculated in part (a).(c) Methane, when liquefied, has a density of 0.466 g>mL;the density of methanol at 25 °C is 0.791…

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