Why is it necessary to provide a temperature with the value of Kc when doing a report?

Ethanol, C,H,O, is most often blended with gasoline - usually as a 10 percent mix - to create a fuel called gasohol. Ethanol is a renewable resource and ethanol-blended fuels, like gasohol, appear to burn more efficiently in combustion engines. The heat of combustion of ethanol is 326.7 kcal/mol. The heat of combustion of 2-methylheptane, C3H18, is 1.306×10³ kcal/mol. How much energy is released during the complete combustion of 482 grams of 2-methylheptane ? kcal Assuming the same efficiency, would 482 grams of ethanol provide more, less, or the same amount of energy as 482 grams of 2- methylheptane v more less the same amount

5. Sodium bicarbonate (NaHCO3) is used to neutralize acids to form sodium chloride, a salt, carbon dioxide gas, and water. Normally sodium bicarbonate is added until the fizzing ceases, at which point no more CO2 (g) is produced. NaHCO3 (s) + HCl (aq) NaCl (aq) + CO2 (g) + H2O (1) If 150. mL of 3.0 M HCl is spilled on a lab bench, what is the minimum mass of sodium bicarbonate that must be used to neutralize the acid?

What is the sum of coefficients from the following reaction (both products and reactants)? X.3H2O + Heat ---> X can be any element.

Aqueous hydrobromic acid HBr reacts with solid sodium hydroxide NaOH to produce aqueous sodium bromide NaBr and liquid water H2O. If 10.0g of water is produced from the reaction of 58.3g of hydrobromic acid and 50.1g of sodium hydroxide, calculate the percent yield of water. Be sure your answer has the correct number of significant digits in it. I keep getting this problem wrong because of the sig. digits, dont round till the end because if it is off by 0.1, it will be incorrect.

Consider the reaction. heat 2 Al(s) + Fe,0,(s) Al, 0,(s) + 2 Fe(1) If 10.7 kg Al reacts with an excess of Fe, O3, how many kilograms of Al,O, will be produced? mass of Al, O, produced: kg * TOOLS x10

What is the sum of coefficients from the following reaction (both products and reactants)? X.3H2O + Heat ---> X can be any element.

01 04 in the balanced equation for the complete combustion of heptane, the coefficient for carbon dioxide is: Cu + O = CO + HO W

esc One way the U.S. Environmental Protection Agency (EPA) tests for chloride contaminants in water is by titrating a sample of silver nitrate solution. Any chloride anions in solution will combine with the silver cations to produce bright white silver chloride precipitate. Suppose an EPA chemist tests a 250. mL sample of groundwater known to be contaminated with copper(II) chloride, which would react with silver nitrate solution like this: CuCl₂(aq) + 2 AgNO3(aq) → 2 AgCl(s) + Cu(NO3)₂(aq) C The chemist adds 90.0 mM silver nitrate solution to the sample until silver chloride stops forming. She then washes, dries, and weighs the precipitate. She finds she has collected 6.0 mg of silver chloride. olla Calculate the concentration of copper(II) chloride contaminant in the original groundwater sample. Round your answer to 2 significant digits. Ar mg x10 L x 5 ? Explnation :: 1 FI 2 Check F2 # 3 80 F3 $ 4 OOD 000 F4 % 5 A FS A 6 F6 & 7 90 Ⓒ2022 McGraw Hill LLC. All Rights Reserved. Terms of…

Q1