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Calculate the nuclear binding energy in Joules/nucleon of uranium 235. The actual mass of one atom is 235.0439 amu.
A chemical reaction in a bomb calorimeter raises the temperature of the calorimeter from 20.22 degrees celsius to 23.14 degrees celsius. If the heat capacity of the calorimeter is 8.44 kj/degrees ce
From atomistic point of view, thermal conductivity of materialsis typically contributed from phonons and electrons. What determine the thermal conductivity of metals, ceramics and polymers?
Air from a manufacturing operation was drawn through a solution containing1.00 x 102 mL of 0.0105 M HCl. The NH3reacts with the HCl to form NH4Cl.
Calculate the volume of chlorine gas @ 20 degrees C and 75.0cmHg if the volume of the gas is 1.01 L at 20 degrees C and 95.5cmHg.
Hydrogen sulfide gas is bubbled into sodium hydroxide solution. Determine the grams of sodium sulfide formed if2.00g of hydrogen sulfide is bubbled into a solution containing2.00g of sodium hydroxid
If the product is SO42- and the reactant isSO32-, calculate the change in the oxidation state of sulfur (oxidation state of sulfur in product minus theoxidation state of sulfur in the reactant
Federal regulations set an upper limit of 50 ppm of NH3 in the air in a work environment ( that is, 50molecules of ammonia for every million molecules in the air). Airfrom a manufacturing operation
Methyl esters (RCO2CH3) undergoes a clevage reaction to yeildcarboxylate ions plus iosomethane on heating with Lil indimethyl formamide.
What is the theoretical limit of the number of electrons that can occupy the principal quantum level n = 5 in one atom?
Discuss the resonance and inductive effects of a halogenatom with respect to the reactivity of a halobenzene compared to benzene in electrophilic aromatic substitution reactions.
Atmospheric measurements of the H2O2/HNO3 concentration ratio is a simple diagnostic of whether O3 production in the troposphere is occurring under NOx limited or VOC-limited conditions.
For a drug to be effective in treating an illness, its levels in the blood stream must be maintained for a period of time. One way to measure the level of a drug in the body is to measure its
50 g of sugar (C12H22O11) is dissolvedin 500 g of water at standard pressure . How much is the boiling point raised and the frezing point lowered?
Identify three catalytic cycles for O3 loss involving Br. Do this by listing the relevant series of reactions and determining the net reaction for the catalytic cycle. The net reaction should includ
Why does an oil-and -vinegar salad dressing have two separate layers? What is meant by the mass/mass percent concentrations of asolution?
If you add 5.0mL of 0.5 M NaOH solution to 20.0 mL each of Buffer B( initial pH of Buffer B is 3.92), andBuffer C, Which buffer's pH would change less? explain
If 0.330 mol of liquid CS2 and 26.9 g of gaseousO2 are reacted stoichiometrically according to the balanced equation, how many moles of gaseous SO2 are produced?
What were the two main pursuits of alchemy? What are the contributions of alchemy to modern chemisty?
A campfire is a chemical reaction involving wood and oxygen from the air. In light of the law of conservation of mass, explain what happens to the mass of the wood during the reaction.
A typical simplest-ratio formula for anthracite coal isC52H16O(s) .The standard enthalpy of formation of anthracite can be estimated at -396.4kJ/mol.
A sample of nitrogen has a volume of 4.22 L at 1,941 mmHgand 170 °C. What volume will it occupy at standard temperature and pressure?
Why does the pH change when you add a salt/common ion? What is the effect of adding a strong acid or base to asolution?
The initial volume of a sample of argon gas is 552 mL at-97°C. If the pressure is held constant and the volume is changed to 933 mL, what will be the new temperature (in°C)?