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If 0.250 mole of hydrogen gas occupies 0.333 L at 20 degrees Celcius, what is the pressure in mmHg
The activation energy of a certain reaction is 45.4kJ/mol. At 28 degrees celcius, the rate constant is 0.0150s^?1. At what temperature in degrees Celsius would this reaction go twice as fast?
Treatment of 10.00g of XCl2 with excess chlorine forms 12.55g XCl4. Calculate the molar mass of the element, X.
Which of the following reactions involves neither oxidation nor reduction?explain
How does "spartan student" work. Supposedly i have work "due" but I do not see how it is "due" and how my teacher will see my assignments if this is a program. Is my saved work able to be seen by my teacher.
Calculate the amount of energy released when 8.02g of Hydrogen reacts with excess Oxygen.
A 1.91 L flask at 17degree contains a mixture of Nitrogen , He and Ne at partial prassure 0f 0.261 atm for N2, 0.195 atm for He, and 0.397 for Ne. Calculate the volume in liters at STP occupied by He and Ne if the N2 is removed.
The alpha-particles ionize molecules in the air, allowing it to conduct an electric current. When smoke particles enter, the conductivity of the air changes and the alarm buzzes. (a) Write the equation for the decay of (mass number 241, protons 95..
Write a balanced equation for the neutralization of each of the following: a)H3PO4(aq) and NaOH(aq) b)HI(aq) and LiOH(aq) c)HNO3(aq) and Ca(OH)2(s)
Computational chemistry-----What two predominant effects govern most chemical reactions and properties. What are the two major types of computational approaches used to model chemicals
the 250-ml erlenmeyer flask has the mass of 78.639 grams. the mass of 250-ml erlenmeyer flask and water 327.039 grams.
At 1.00 atm and 0 °C, a 5.04 L mixture of methane (CH4) and propane (C3H8) was burned, producing 18.0 g of CO2. What was the mole fraction of each gas in the mixture? Assume complete combustion.
Does the octet rule mean that a diatomic molecule has 16 valence electrons? Select from the following:
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