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Consider a 1.00-L solution containing 85.5 g Al2(SO4)3 (FW = 342.15) and 21.3 g Na2SO4 (FW = 142.06). What are the molar concentrations of aluminum, sodium, and sulfate ions, respectively
The bullet becomes embedded in the block. If the bullet-block system compresses the spring by a maximum of 88.0 cm, what was the speed of the bullet at impact with the block?
A patient needs to take 375mg of ibuprofen twice daily. The pills in the bottle are each 250. mg. How many pills does the patient need to take each time she wants the 375mg dosage? Assume that these
What's the actual Ka value of potassium hydrogen tartrate?
The observed osmotic pressure of this solution is 7.83 atm at 25°C. What percentage of the moles of NaCl in this solution are ion pairs?
The mass of a robot is 5900 kg. This robot weighs 3770 N more on planet A than it does on planet B. Both planets have the same radius of 1.33 multiplied by 107 m. What is the difference MA - MB in
A student places 59.5 g of a diatomic gas into a 10.0-L container at 298 K and measures the pressure to be 2.053 atm. Determine the identity of the diatomic gas.
A 280-{rm mL} flask contains pure helium at a pressure of 753 {rm torr}. A second flask with a volume of 480 {rm mL} contains pure argon at a pressure of 723 {rm torr} what is the partial pressure
Gayle runs at a speed of 4.80 m/s and dives on a sled, initially at rest on the top of a frictionless snow covered hill. After she has descended a vertical distance of 5.00 m, her brother, who is in
If 84 of heat are added to a pure gold coin with a mass of 15 , what is its temperature change? Specific heat capacity of gold is 0.128
The enthalpy of formation of ethanol, C2H5OH, is 277.o kJ/mol at 298.15K. Calculate the enthalpy of combustion of one mole of ethanol, assuming that the products are CO2 and H2O.
A 50.0g silver object and a 45.0 g gold object are both added to a 55.5 mL of water contained in a graduate cylinder.
A radical chain polymerization following Rp [M]Kp(fKd[I]/Kt)rised to 1/2 shows the indicated conversions for specified initial monomer and initiator concentrations and reaction times:
A rifle with a barrel length of 64 cm fires a 12 g bullet with a horizontal speed of 350 m/s . The bullet strikes a block of wood and penetrates to a depth of 10 cm .
a reaction vessel contains 15.1g of CO2 and 15.1g of O2. How many grams of CO2 would be produced according to 2CO+O2----->2CO2
A 36.0-mg sample of an organic compound (MW = 84g/mol) is dissolved in 10.0-mL of water. This aqueous solution is extracted with 5.0mL of hexane. Separation and analysis of the aqueous phase shows t
Complete the Lewis structure for the molecule RDX by adding unshared electron pairs where they are needed.
If 10.0mL of acetic acid, CH3COOH, is diluted with water to a total volume of 200.0mL, what is the percent by volume of acetic acid in the solution?
The water level in a graduated cylinder initially at 224 rises to 274 after a piece of lead is submerged. What is the mass in grams of the lead?
A 46.0- person takes a nap in a backyard hammock. Both ropes supporting the hammock are at an angle of 19.0 above the horizontal. Find the tension in the ropes.
Careful spectral analysis shows the the familiar yellow light of sodium lamps (such as street lamps) is made up of photons of two wavelengths, 589.0 and 589.6 nanometer.
When equilibrium is reached at 700C, the total pressure of the system is found to be 4 atm. If the equilibrium constant Kp for this reaction is equal to 1.52, calculate the equilibrium partial pres
Write the structural formula for each of the following compounds, Draw the molecule by placing atoms on the grid and connecting them with bonds. Include all hydrogen atoms.
if 50.0 mL of H2 and 50.0 mL of c2h4 are allowed to react at 1.5 atm, the produce c2h6 ha a volume of 50.0 mL.. calculate the amount of PV work done
If you place .092 mol of iron filling in a solution containing .158 mol of CuSO4, what is the limiting reactant? How many moles of Cu will be formed?