What is the partial pressure of he
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 of He
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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.
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.
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
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 initially at rest, hops on her back and together th
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.
What is the "Magnolia myth," and how does it differ from what has been taught in American History textbooks about slavery since the 1970's?
For the reaction given below, the frequency factor A is 8.7 x 10^12 s-1 and the activation energy is 63 kJ/mol. NO(g) + O3(g) -->NO2(g) + O2(g) What is the rate constant for the reaction at 75 C?
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 the masses of these planets?
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When a counselor asks a client to pretend to interview for a job, and the counselor pretends to be an employer,
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