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How many grams of ethylene glycol (automobile antifreeze, {rm C_2H_6O_2}) dissolved in 3.30 {rm kg} of water is needed to lower the freezing point of water in an automobile radiator to 24.5^circ {rm C}?
A buffer, consisting of H2PO4- and HPO42-, helps control the pH of physiological fluids. Many carbonated soft drinks also use this buffer system.
Determine the Boyle temperature for a gas with the equation of state: PVm=RT(1+(P/Pc)(Tc/T)*8/57*(1-4(T/Tc)^2)).
What is the minimum mass of sulfur dioxide necessary to produce 200. grams of sulfuric acid in the reaction?
A compound is constituted by mass of 22.6% phosphorus, the rest being chlorine. Given that a volume of 307 mL of the gas has a mass of 1.55 g at 25 °C and 90 kPa, find the molecular formula for this compound
A gas occupies 22.4 L at STP and 14.5L at 100 C and 2.00 atm pressure. how many moles of gas did the system gain or lose?
The freezing point of pure benzene is 5.50 °C and the freezing point depression constant of benzene, Kfp, is -5.12 °C/m.
Make a graph of density (y) vs. concetration in mass% (x). Record the slope of y-intercept of the line
molarity of acetic acid in a 15ml sample of vinegar that requires 22.7 ml of 0.550M solution of NaOH to reach neutralization point
A sprinter must average 24.0 mi/h to win a 100-m dash in 9.30 s. What is his wavelength at this speed if his mass is 84.5 kg
How many moles of oxygen are required for the complete combustion of 4.0 moles of decane to give CO2 and H2O
A sample of 57 grams of H 2 O with a temperature of sixteen degree celsius is combined to 260 grams of H2O at 90 degree celsius in an insulated container. Determine the final temperature after thermal equilibrium is reached?
what is the molar mass of a sample of gas that has a dnesity of 1.09 g/L at 1.02 atm pressure and 25.0C.
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