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1. A chemical engineer studying the properties of fuels placed 1.500 g of a hydrocarbon in the bomb of a calorimeter and filled it with O2 gas. The bomb was immersed in 2.500 L of water and the reaction initiated. The water temperature rose from 20.00°C to 23.55°C. If the calorimeter (excluding the water) had a heat capacity of 403.0 J/K, what was the heat of combustion (total heat from the reaction) per gram of the fuel?
2. Classify the following mixtures as homogeneous or heterogeneous. Explain your reasoning.
a. lemon juice
b. tap water
c. house paint
d. blood
Using electronegativity, predict in the order of decreasing polarity the following bonds: N-P, N-O, N-C, N-S, N-F. Predict how valence electrons would pair up in the AsO4-3 ion.
your chemiluminescence reaction will actually occur very slowly in air. what component of air will bring about this
You have successfully purified a protein to homogeneity. From gel permeation chromatography studies, you determine that the protein has a molecular weight for 235,000 daltons.
Consider the following generic chemical equation. 2A+4B ---> 3C. What is the limiting reactant when each of the following amounts of A and B are allowed to react? 2 mol A; 5 mol B 1.8 mol A; 4 mol B 3 mol A; 4 mol B 22 mol A; 40 mol B
Use a molar mass of 800g/mol for the vegetable oil and use a density of 0.88g/mL for vegetable oil and 0.79 g/mL for methanol to calculate how many moles of ethanol are used.
where it is burned with 12% excess air. Calculate the required flow rate of air in SCMH(standard cubic meters per hour).
The Carbohydrate content of a glycoprotein is determined to be 12.6, 11.9, 13.0, 12.7, 12.5 g of carbohydrate per 100 g protein in replicate analysis.
For the reaction 2A+B=3C the value of Kc=10.2 at 25 degrees C. A 1L vessel contained a mixture of 0.50 mol of A, 1.20 mol B and 4.00 mol C at the same temperature. Is the mixture in a state of equilibrium. If not predict the direction of reaction
describe the coordination geometry e.g. octahedral for each metal ion and the mxnlm formula for deoxy and oxy form of
Unit cell problem of copper (Cu) is a face-centered cube that has an edge lenth of 3.62 A (note: 1A=1*10^-10 m). Determine the volume occupied by one mole of copper atoms, , in terms of mL/mol.
Write balanced net ionci equations for the following electrolysis reactions using platinum electrodes 1. aquos potassium fluoride
Hydrogen cyanide is produced industrially by the following exothermic reaction. 2 NH3(g) + 3 O2(g) + 2 CH4(g)---> 2 HCN(g) + 6 H2O(g) Is the high temperature needed for thermodynamic or kinetic reasons
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