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A breathing mixture used by deep-sea divers contains helium, oxygen and carbon dioxide. What is the partial pressure of O2 at 101.3 kPa total pressure if the partial pressure of He = 84.0 kPa and the partial pressure of CO2 = 0.1 kPa?
A 250 g yo-yo is swung on the end of a50 cm string at a constant speed of 4 m/s. What is the centripetal force acting on the yo-yo?
Predict the relative order of Rf values for the amino acids in the following mixture: Ser, Lys, Leu, Val, and Ala. Assume that the separation was carried out on paper chromatography
Nitric oxides, NO and NO_2, contribute to air pollution, acid rain, and the depletion of the ozone layer. After NO forms in the combustion chamber of an automobile engine, it reacts further with oxygen to form NO_2. The reaction is given by 2NO (g..
how many megajoules of energy in the form of heat can be produced per year (365 days) by the heater
If the reaction N2(g) + 3H2(g) ! 2NH3(g) is carried out at constant temperature and pressure, how much H2 is required to react with 6.4 L liters of N2.
If the pH of a 1.00-in. rainfall over 1500 miles2 is 3.80, how many kilograms of sulfuric acid, H2SO4, are present,assuming that it is the only acid contributing to the pH
How many grams of Hcl will be produced from the reaction of 50.0mL of a 0.300M CaCl2 according to the reaction:CaCl2 + H3PO4(aq) ----> Ca3(PO4)2 (s) + HCl (aq)
Ethanol normally boils at 78.4C. the boiling point elevation constant for ethanol is 1.22C/m. what is the boiling point of a 1.0 m solution
Give two reasons why anhydrous conditions must be maintained during a Grignard synthesis. Write chemical reactions to explain
The oxygen atom with its 2s orbital forms a s bond with one of the three sp2 hybrid orbitals of the carbon atom; the two hydrogen atoms with their 1s orbitals each form a s bond with one of the three sp2 hybrid orbitals of the carbon atom.
If 250.0 mL of 0.354 M Phosphoric acid need to be prepared, how many grams of H3PO4 need to be added to water to make this solution
Write a balanced nuclear reaction for the production of dubnium-260 and neutron(s) by bombardment of californium-249 with high-energy
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