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A volume of 18.0 \rm L contains a mixture of 0.250 \rm mole~ N_2 , 0.250 \rm mole \rm O_2 , and an unknown quantity of \rm He. The temperature of the mixture is 0 \rm ^{\circ}C , and the total pressure is 1.00 \rm atm . How many grams of helium are present in the gas mixture?
Kp for this reaction is 5.1 x 10-2 atm-1. Initially, 1.00 g each of SO2 and Cl2 are placed in a 1.00 L reaction vessel. After 15 minutes, the concentration of SO2Cl2 is 45.5 μg/mL.
An element has 2 naturally occurring isotopes. Isotope 1 has 120.9038 amu and a relative abundance of 57.4%, and isotope 2 has a mass of 122.9042 amu. Find the atomic mass of this element and by comparing it to the periodic table identify it.
When 24 copper pennies are submerged in water, the pennies displace 8.26 cm3 of water. If the combined mass of the pennies is 73.86 g, what is the density of copper?
Explain why Markovnikov's rule is needed to predict the products of hydration and hydrohalogenation, but is not needed to predict the products
Describe the major organic product(s) of this reaction. CH3C?CD + CH4 or CH3C?CCD or CH3C?CCH3 or CH3C?CD + CH3D or CD3C?CD3
If a bottle of nail polish remover contains 151 g of acetone, how much heat would be released by its complete combustion?
sample of a gas at 25.0 oC and at a pressure of 3 atm, what will the pressure be if the temperature is raised to 50.0 oC?
a photon of ultraviolent lights possesses enough energy to mutate a strand of human dna. what is the energy of a single uv photon and a mole of uv photons having a wavelength of 25 nm
Titrations: Finding Concentration, A 35.00 mL solution containing an unknown concentration of pyruvic acid required 25.13 mL of 0.2011 M NaOH to reach the end point.
If a raindrop weighs 65 mg on average and 5.1 105 raindrops fall on a lawn every minute, what mass (in kg) of rain falls on the lawn in 1.5 h?
Write structures for all the structural isomers of double-bonded compounds with the molecular formula C5H10. Of the compounds
Metals such as magnesium and zinc react with dilute sulfuric acid to give hydrogen, according to the equation: M (s) + H2SO4 (aq) -------> MSO4 (aq) + H2 (g) When 5.00 g of a mixture of powdered magnesium and zinc were dissolved in diluted sulfuri..
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