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A water dispenser for pets has an invented plastic bottle ( the water is dyed blue for contrast).When a certain amount of water is drunk from the bowl, Explain the operation of the dispenser
If a solution containing 43.297 g of mercury(II) acetate is allowed to react completely with a solution containing 12.026 g of sodium sulfate, how many grams of solid precipitate will be formed. How
A truck travels 2.75 km north and then makes a 90° left turn and drives another 4.90 km. The whole trip takes 6.00 min. What is the magnitude of the average velocity for this trip
The 230,000 lb space-shuttle orbiter touches down at about 220 mi/hr. find the corresponding distance (in feet) traveled by the orbiter
The addition of NH3 precipitated Fe2O3·xH2O which was subsequently ignited to produce 0.304 g of Fe2O3. What was the mass of FeSO4·7H2O in the 3.075-g sample
A sample weighing 3.183 g is a mixture of Fe2O3 (molar mass = 159.69) and Al2O3 (molar mass = 101.96). When heat and a stream of H2 gas is applied to the sample
A 2.3 L volume of ideal neon gas (monatomic) is at a pressure of 5.7 atmospheres and a temperature of 390 K. find The number of neon atoms in the gas
Select one (1) mental disorder that intrigues you the most, then suggest a treatment approach for the disorder you selected based on evidence discussed in the textbook related to the treatment of
A bolt comes loose from underneath an elevator that is moving upward at a speed of 6.9 m/s. What is the speed of the bolt when it hits the bottom of the shaft
Find the equilibrium concentrations of A and B for a = 2 and b = 2. Assume that the initial concentration of A is 1.0 M and that no B is present at the beginning of the reaction.
In a lightning bolt, a large amount of charge flows during a time of 2.1 x 10-3 s. How much charged has flowed during the lightning bolt?
If a mixture of solid nickel(II) oxide and 0.11M carbon monoxide is allowed to come to equilibrium at 1500 K, what will be the equilibrium concentration of CO2
What aspects of evolutionary psychology and or sociosexuality do you find most and least persuasive and why? How do you think differences in sociosexuality might be related to differences in ag
A tungsten wire has a radius of 0.070 mm and is heated from 20.0 to 1330 oC. The temperature coefficient of resistivity is ? = 4.5 x 10-3 (Co)-1, How long is the wire
Plot on the same graph the indicator diagrams for the isothermal reversible expansion of (a) a perfect gas, (b) a Van der Waals gas for which a=0 and b=5.11 x 10^-2 dm3 mol -1, and (c) a Van der Waa
The silk has a density of 1300kg/m3. if you tap the branch and send a vibration down the thread how long does it take to reach the spider
Synthetic polypeptides can assume an helical structure under appropriate conditions. Indicate whether polylysine and polyglutamate form an helix or a disordered structure at the indicated pH values.
The total electric field consists of the vector sum of two parts. One part has a magnitude of E1 = 1300 N/C, Find the magnitude and direction of the total field
The acid dissociation constants listed in most standard reference texts for carbonic acid actually apply to dissolved CO2. For a CO2 partial pressure of 8.3×10-4 atm in the atmosphere, what is
A steel cable with total length 30 m and mass 100 kg is connected to two poles. Calculate the wavelength of the resulting wave on the cable
Calculate the pH and molar concentration of each protonated form for a 0.133 M solution of NaHA.
Jake has become very anxious ever since he started taking harder classes in his major. The university's counselor diagnosed him with an anxiety disorder.
Aqueous sulfuric acid reacts with solid sodium hydroxide to produce aqueous sodium sulfate and liquid water. If 1.92 g of sodium sulfate is produced from the reaction of 4.9 g of sulfuric acid and 7
In the following reaction: A + 2B --> 3C + D the MM(A) = 75 g/mol, MM (B) = 52 g/mole, MM(C)= 87 g/mol. If 250g of A and 310g of B combined, what is the limiting reagent, and what is the theoreti
Sheena can row a boat at 2.97 mi/h in still water. She needs to cross a river that is 1.24 mi wide with a current flowing at 1.67 mi/h. How long does it take her to cross the river