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If a space probe weights 39,200 N on the surface of earth, what will be the mass of the probe on the surface of mars.
The latent heat of vaporization of mercury is around 300,000 J/kg. What is the least amount of mercury (in kg) that can be vaporized when 3 million joules are introduced?
calculate the density of the pheromone in grams per liter in a cylindrical air space with a radius of 0.50 mi and a height of 40ft.
The heat combustion of acetylene, C2H2(g), at 25°C, is -1299 kJ/mol. At this temperature, ?H°f values for CO2(g) and H2O(l) are -393 and -286 kJ/mol
An aqueous antifreeze solution is 40.0% ethylene glycol, C_2H_6O_2, by mass. The density of the solution is 1.05 g/ml. Calculate the molality of the ethylene glycol.
what are possible reasons for the differences observed in conductivity for H3PO4 and H3BO3? Explain it please. B) Write out the dissociation steps for H3PO4 and H3BO3.
What is the molarity of the new solution compared to the molarity of the initial solution?
A 100.0-mL sample of 0.10 M NH3 is titrated with 0.10 M HNO3. What is the pH of the solution after 100.00 mL of acid have been added to the ammonia solution?Kb = 1.8 × 10-5.
A gas mixture with a total pressure of 750 contains each of the following gases at the indicated partial pressures: , 253 ; , 120 ; and , 173 . The mixture also contains helium gas.
What is the difference between an amino acid and a protein? How does this difference in structure affect biological function?
If equal volumes of 0.15 NaOH and 0.10 NaH2PO4 are mixed what type of system is formed? A) Buffer Ka2 B) amphiprotic C) Buffer Ka3 D) strong base
Suppose that microwave radiation has a wavelength of 11.2cm. How many protons are required to heat 245mL of Coffee from 25.0 C to 62.0C? Assume that the coffee has the same density,
how much energy is liberated when 366 g of mercury (c=0.139j/g degrees celsius)cools from 77.0 C to 12.0 degrees celsius?
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