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A tank of pressurized helium is used to inflate balloons at a circus. The tank contains 3.87 L of helium at a pressure of 1294.7 kPa. If the volume of a balloon is 2.2 L, how many balloons can be completely filled on a day where the atmospheric pressure is 91.8 kPa?
A 5.0 ml sample of vinegar was titrated with 7.2 ml of 0.55 M NaOH. if the density of vinegar solution is 1.00g/ml, what is the mass percent of acetic acid present.
Platinum metal is used in jewelry. It is as well used in automobile catalytic converters. Explain what is the mass of a cube of platinum 3.19 cm on an edge? The density of platinum is 21.4 g/cm3.
sulfuric acid (H2SO4) by mass has a density of 1.221 g/mL. Determine the molarity of the solution.
Determine the Ka of a 0.1M solution of acetic acid in which the hydronium ion concentration is 1.35 x 10^-3 M
Will a precipitate form when 20.0mL of Pb(NO3)2(aq) with a concentration of 2.50x10-4 mol/L is reacted with 45.0mL of CaCl2(aq) with a concentration of 1.25x10-3 mol/L
A chemical reaction in which the atoms of the reactants undergo a change in the oxidation state is called a redox reaction. Such involve both oxidation (increase in oxidation state) and reduction
a particle has a velocity equal to 0.25 c and a wavelength of 1.3 x 10^-16 m. Calculate the mass of the particle in kilograms. c=3.0 x 10^8 m/s
How many grams of oxygen gas are required to produce 7.68 kJ of heat when hydrogen gas burns at constant pressure to produce gaseous water?
In general terms, why do functional groups impart more chemical reactivity to families that have them. Why don't the alkanes display as many reactions as, say, the amines. Select all that apply
What is the value of ?E for the change? Is the overall change exothermic or endothermic?
2NOCl(g) → 2NO(g) + Cl2(g) ,At 450 K the rate constant is 15.4 atm-1s-1. How much time (in s) is needed for NOCl originally at a partial pressure of 46 torr to decay to 25.8 torr.
given the balanced equation representing a reacction2c2h67o24co26h2odetermine the total number of moles of oxygen that
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