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Identify the spectator ions present when the following are mixed.
A train at a constant 43.0 km/h moves east for 22 min, then in a direction 43.0° east of due north for 30.0 min, and then west for 55.0 min. What are the (a) magnitude (in km/h) and (b) angle (r
The conversion of one air pollutant, nitrogen monoxide, produced in vehicle engines, into another, nitrogen dioxide, occurs when nitrogen monoxide reacts with molecular oxygen in the air. Including
Which combinations of cation and anion, chosen from the following lists, are compatible with the observed results?
Calculate the amount of heat [kcal] released when 50.0 g of steam at 100 °C hits the skin, condenses, and cools to a body temperature of 37 °C.
The rocket attains its launch speed in a negligibly short period of time, after which its engines shut down and the rocket coasts. By how much does the rocket clear the top of the wall?
The vapor pressure of pure water at 70 C is 235 mm Hg. What is the vapor pressure depression of a solution of 125 g of the antifreeze ethylene glycol, C2H6O2, a nonvolatile compound, in 205 g of wa
A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 4.8 m/s relative to the ground. When the train moves at a constant velocity, th
Calculate the mass of acid in the tank then find number of moles of H2SO4 .(Concentrated sulfuric acid is 98% ( by mass) H2SO4 &has a density of 1.84g//cm3
Calculate the root mean square velocity for a carbon dioxide molecule at 273 K. The thermodynamic constant R = 8.31451 J/K mol. Show your calculation.
Draw the molecule by placing atoms on the grid and connecting them with bonds. Include all lone pairs of electrons. Show the formal charges of all atoms in the correct structure.
A 100.-L flask contains a mixture of methane, CH4, and argon at 25C. The mass of argon present is 228 g and the mole fraction of methane in the mixture is 0.650. Calculate the total kinetic energy
The magnitude of the maximum acceleration is typically 1.3 {rm m}/{rm s}^{2}, but the driver will usually maintain a constant acceleration that is less than the maximum. A train travels through a co
Calculate the pH of the HCl solution prior to adding NaOH, the pH at the halfway point, and the pH at the stoichiometric point. Draw the titration curve with pH on the y-axis and volume of NaOH adde
What is the percent yield if only 153 g of XeF4 is actually isolated?
Using calipers, you find that a copper cylinder has length 8.625 cm and diameter 1.218cm . An electronic pan balance shows that its mass is 89.84 g. Find the cylinder's density.
A 3.00-rm L flask is filled with gaseous ammonia, rm NH_3. The gas pressure measured at 22.0, ^{circ}C is 2.05 atm. Assuming ideal gas behavior, how many grams of ammonia are in the flask?
A dolphin in 25°C sea water emits a sound directly toward the bottom of the ocean 135 m below. How much time passes before it hears an echo? (The speed of sound in sea water is 1530 m/s.)
Write the acid/base equilibrium reaction (net-ionic) for the major species present in an aqueous solution of each of the following substances. use H3O+ as the acidic species
How many times faster is the speed you found in (a) than the speeds of our fastest current spacecraft (around 50,000 km/hr)?
One cubic meter (1.0 m3) of aluminum has a mass of 2700 kg, and a cubic meter of iron has a mass of 7860 kg. Find the radius of a solid aluminum sphere that has the same mass as a solid iron sphere
Arrange CH4, Cl2, and CO2 in order of increasing strength of dispersion forces. (least to the greatest)
Calculate the equilibrium concentrations of reactants and product when 0.238 moles of CH4 and 0.238 moles of CCl4 are introduced into a 1.00 L vessel at 350 K.
The velocity of the pile driver at the point of contact with the pile.
Why cost is often a major factor in choosing a limiting reactant?