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A system initially has an internal energy E of 501 J. It undergoes a process during which it releases 111 J of heat energy to the surroundings, and does work of 222 J. What is the final energy of the system, in J?
What is the strongest intermolecular force exhibited in each? (One choice will not be used). a. covalent molecules b. ionic compounds c. polar covalent molecules choices
calculate the molarity of h3o in a solution with oh-1.00x10-8 moll. is the solution acidic basic or
Calculate the heat capacity of satan, i. e. Ni . if 30.0g of nickel at 100.0 c raises the temperature of 25.0g of water from 22.0 c to 30.8 c . assume no heat loss to the surroundings.
Calculate the volumes of 0.20M acetic acid, 0.20M sodium acetate, and pure water needed to make 20.00 mL of a buffer having pH=5.00. Repeat analogous, seperate calculations for buffers having pH=4.00 and pH=6.00. In each case determine the amounts..
Problem- Assuming that the heat capacities don't change with temperature, how much energy in kilojoules is needed to heat 6.95g of Hg from a temperature of -52.5?C to 40.0?C
Determine the moles of benzene that would be needed to completely react with 0.445 moles of oxygen
For steady flow in a heat exchanger at just about atmospheric pressure, explain what is the heat transferred. Explain when 20 mol of ammonia is heated from 100 to 800 deg. C
What volume of hydrogen gas at STP is required for the complete reaction of 50.0 g of nitrogen in the following reaction? N2(g) + 3 H2(g) ? 2 NH3(g)
when 7.20 grams of h2so4 l at 22.0oc are poured into a 94.0 gram mixture of ice and watercontaining 6.15 grams of ice a
Draw and exlpain using representation of molecular orbitals the structure and bonding found in ethane; indicate clearly the structure
calculate the percent of radioactive parent atoms remaining 2 hours after medicine is administered. the percent is the
According to Avogadro's law, how many liters of hydrogen are required to react with 1.9L of oxygen at STP.
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