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How many moles of urea (60. g/mol) must be dissolved in 71.6 g of water to give a 2.4 m solution?
Consider a solution that is 0.01M formic acid and 0.2M hydrochloric acid. Determine the pH of this solution.
What would be the speed of the following particles if they had the same wavelength as a photon of green light (? = 500.0 nm)? Proton (mass = 1.673 × 10-24 g) Neutron (mass = 1.675 × 10-24 g) Electron (mass = 9.109 × 10-28 g) Alpha particle (mass =..
A gas-forming reaction produes 1.30 m3 of gas against a constant pressure of 178.0 kPa. Calculate the work done by the gas in joules.
The syringe used in this experiment is calibrated to 60 mL. However, there is a 'dead volume' at the needle end of the syringe that is uncalibrated. This volume equals 1.20 mL. Bearing in mind that the syringe is upside down
A compound's 13C NMR spectrum shows a resonance at 176 and 85 ppm. What possible structural subunit does the compound contain
A 350.0 gram sample of copper is initially at 25.0 °C. It absorbs 12.50 kJ of heat from its surroundings. What is its final temperature, to the nearest tenth of a degree?
Nitrogen dioxide decomposes at 6.50 x 10-3 M s-1 during the reaction: 2NO2(g) --> 2NO(g) + O2(g) Answer the following questions:
A mixture of nitrogen and oxygen gas is collected by displacement of water 30 degrees celsius and 700 torr Hg pressure. If the partial pressure of nitrogen is 550 torr Hg, what is the partial pressure of oxygen? (Vapor pressure of H2O at 30 degree..
Z- is a weak base. An aqueous solution of NaZ is prepared by dissolving .350 mol of NaZ in sufficient water to yield 1.0 L of solution. The pH of the solution was 8.93 at 25.0 C. The Kb of Z- is
Combinations of palladium(II) cations, triphenylphosphine molecules, chloride anions, and ammonium cations result in the formation of a series of five coordination compounds.
What is the pressure of the gas in this mercury manometer if h = 73 mm and atmospheric pressure
How much energy in J must be added to 36.04g of solid water at -15 celcius degree to conver it to liquid water at 12 celcius
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