Chemistry

I need help with number 17 pls someone pls ???
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1. The octane present in gasoline burns according to the following equation:2 C8H18 + 25 O2 16 CO2 + 18 H2O(a) How many moles of O2 are needed to react fully with 27.5 moles of octane?
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17. The equation below represents a chemical reaction that occurs in living cells.CoH1206 + 602 -- 6002 + 6H20 + energyHow many atoms are represented in the reactants of this equation?
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What happens when you mix calcium chloride and hydrogen peroxide?
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a student needs to use 0.485 moles of sodium chloride in an experiment how many grams should he measure out in grams. (show work)
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Convert 6.62 X 10^23 atoms to moles
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how many grams are in 6.8L of Oxygen gas (O2) at STP
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HURRY!!!!!! HELP PLEASEEE To begin the experiment, 1.65g of methane CH4 is burned in a bomb calorimeter containing 1000 grams of water. The initial temperature of water is 18.98oC. The specific heat of water is 4.184 J/g oC. The heat capacity of the calorimeter is 615 J/ oC . After the reaction the final temperature of the water is 36.38oC.2. Calculate the change in temperature, T. Show your work. (1pt)3. Calculate the heat absorbed by water. Use the formula qwater = m C T Show your work (2pts)4.Calculate the heat absorbed by the Calorimeter. Use the formula: qcal = Ccal T Show your work. (2pts)5. The total heat absorbed by the water and the calorimeter can be calculated by adding the heat calculated in steps 3 and 4. The amount of heat released by the reaction is equal to the amount of heat absorbed with the negative sign as this is an exothermic reaction. (2pts)a.Using the formula H = - (qcal + qwater ) , calculate the total heat of combustion. Show your work. b. Convert heat of combustion (answer from part a) from joules to kilojoules. Show your work.6. Evaluate the information contained in this calculation and complete the following sentence: (2pts)This calculation shows that burning _______ grams of methane [TAKES IN] / [GIVES OFF] energy (Choose one).7. The molar mass of methane is 16.04 g/mol. Calculate the number of moles of methane burned in the experiment. Show your work. (2pts)8. What is the experimental molar heat of combustion in KJ/mol? Show your work. (2pts)9. The accepted value for the heat of combustion of methane is -890 KJ/mol . Explain why the experimental data might differ from the theoretical value in 2-3 complete sentences. (2pts)10. Given the formula: % error= |(theoretical value - experimental value)/theoretical value)| x 100 Calculate the percent error. Show your work. (2pts)
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Provide a balanced molecular equation, total ionic, and net ionic equation for sodium phosphate and zinc acetate.
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N2 + 3H2 2NH3How many moles of hydrogen, H2, are needed to react with 3.5 moles of nitrogen, N2?
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The electric field around a positive charge will:
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Sea, sand, sky, palms made almost all of
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how many liters of 0.150 m hcl would be required to react completely with 8.00 grams of magnesium hydroxide
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Sandy is conducting an investigation to find out whichfood his dog likes best. Which is the dependent variablein his investigation?color of thedog's dishBROWNamount offood eatenthe type offood givenPINKLIGHT GREEN
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Excess Fe reacted with 650mL of 0.75M H3PO4. What mass of hydrogen gas was produced? g H2 Fe + H3PO4 Fe3(PO4)2 + H2
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What is metallurgy?A. Science of minerals.B. Science of working with metals.C. Science of breaking down rock.D. Science of volcanoes.
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How much heat does it take to raise 100g of aluminum (c= .9 J/gC) from 12.5C to 31C?
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plz, help me I'm so confused!(this is also science)
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PLEASE ANSWER THIS ASAP I WILL MARK YOU THE BRAINLIEST The actual subject is Science but they dont have that as a option in pick a subject
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Yall Someone plz help me with these problems.Girl I will report if u troll or link
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Copper(Ii) Iodate + Potassium Carbonate = Potassium Iodate + copper(I)carbonate into a formula equation ?
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If a sample of oxygen gas has a pressure of 810 torr at 298 K, what will be its pressure if its temperature is raised to 330K?
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Help!!!!I cant understand this question
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Which of these cannot bea source of centripetal force?A. massB. frictionC. electric forceD. gravity
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