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Problem 1 - Energy, q, w, Enthalpy, and Stoichiometry Consider the following reaction: 2Mg(s)+O2(g)>>2MgO(s)?H = -1204kJ 1) Is this reaction exothermic or endothermic? 2) Calculate the amount of heat transferred when 2.5 g of Mg(s) reacts at constant pressure. Express your answer using two significant figures. 3)How many grams of MgO are produced during an enthalpy change of -97.0 kJ ? 4)How many kilojoules of heat are absorbed when 7.90 g of MgO(s) is decomposed into Mg(s) and O2(g) at constant pressure?
Assuming that seawater has a total ion concentration (a.k.a colligative molarity) of 1.10 Mc, calculate how many liters of seawater are needed to produce 15.4 L of fresh water at 20 °C with an applied pressure of 75.0 bar.
Explain for which of the following species is resonance an important property: HONO, HONO2, N3-, NO2-, NO2
What term describes a solution in which the solute concentration exceeds its equilibrium concentration under the prevailing conditions?
The planet Jupiter has a mass 318 times that of Earth, and its surface temperature is 140 K. Mercury has a mass 0.05 times that of Earth, and its surface temperature is between 600 K and 700 K. On which planet is the atmosphere more likely to obey..
At constant volume, the heat of combustion of a particular compound is -3698.0 KJ/mol. When 1.895 g of this compound (molar mass=181.06 g/mol) was burned in a bomb calorimeter
what is the difference of the KBR specrtum in % transmittance and absorbance. and btw wavenumber and wavelength
What is the theoretical yield of aspirin if 175 kg of salicylic acid is allowed to react with 118 kg of acetic anhydride?
1. A corrosion technologist pipetted a 100.00 mL hard water sample and titrated it with 37.64 mL of 0.01 M EDTA solution for a total hardness endpoint, and 29.32 mL of 0.01 M EDTA solution for a calcium endpoint.
A pound of coffee beans yields 70 cups of coffee (4 cups = 1 qt). How many milliliters of coffee can be obtained from 1.0 g of coffee beans.
Write, using correct notation, the balanced nuclear reaction equation for each of the following:a. Electron capture by 93/43 Tc
A solution was prepared by mixing 70ml of 4.00 mol/L HCl and 30.0 mL of 8.00 mol/L HNO3. Water was then added until the final volume was 500ml. What is the [H+] and what is the pH ?
The conversion of cyclopropane, an anesthetic, to propylene has a rate constant k - 1.3x10?6 s?1 at 400°C and k = 1.1x10?5 s?1 at 430°C. a) What is the activation energy in kJ mol?1
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