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Body injury from electricity depends on the magnitude of the current and its path (see the Highlight: Electrical Safety, Chapter 8.4). However, signs warning "Danger. High Voltage" are commonly seen ( Fig. 8.34). Shouldn't the signs refer to high current? Explain.
The value of delta E for a system that performs 213 kJ of work on its surroundings and loses 79 kJ of heat is kJ
Write and balance the eguation for a neutralization of sulfuric acid of unknown concentration by sodium hydroxide. Calculate the molarity of an unknown sulfuric acid solution of a 25.0 mL sample of the acid solution consumes 27.2 of 0.138 M NaOH s..
How many Carbon 14 atoms are in a charcoal sample that has a decay rate of 3500 disintegrations per min
Verify that this is a first order reaction by plotting 1n ([C2H40]/M versus time and determine the value of the rate constant.
In a titration of 38.16 mL of 0.1234 M hydrazoic acid (HN3, Ka = 1.900x10-5) with 0.08559 M KOH, what is the pH after 87.78 mLs of titrant have been added
At room temperature (about 20degree C) milk turms sour in about 64 hours. In a refrigerator at 3 degree C, milk can be stored for about three times as long before turning sour.
The heat of combustion of bituminous coal is 2.5 × 104 J/g. What quantity of the coal is required to produce the energy to convert 100. lb of ice at 0°C to steam at 100°C?
A sample of .755g of NaHCO3 was dissolved in 25mL of .960 M HCl. After heating, 6.7 mL of .601 M NaOH was needed to neutralize the excess acid that was not neautralized
the half-life of tritium 31h is 12.3 years. if 47.0 mg of tritium is released from a nuclear power plant during the
The first ionization energy of Ca is 590 kJ/mol and its second ionization energy is 1145 kJ/mol. The heat of sublimation of Ca is 178 kJ/mol. The bond energy of Br2 is 193 kJ/mol, the heat of vaporization of Br2(l) is 31 kJ/mol , and the electron ..
A chemist dissolves 0.9 g of an unknown monoprotic (one acidic H) acid in water. She finds that 14.6 mL of 0.426 M NaOH are required to neutralize the acid.
Calculate the ph of a solution formed by mixing 100.0ml of .20 M HCLO with 200.0 ml of .30 M KCLO. the ka for HCLO is 2.9x10^-8
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