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Calculate the energy in the form of heat in kj, required to convert 225 grams of liquid water at 21.0 degrees Celsius to steam at 115 degrees Celsius. The heat of fusion is 0.33 kj/g, the heat of vaporization is 2.26 jk/g, specific heat capacities for liquid water is 4.18 J/g degrees C and for steam it is 1.92j/g degrees C
What is the molarity of a calcium hydroxide solution if a 25.0 mL sample is exaclty neutralized by 42.5 mL of 0.0750 M nitric acid?
Gasoline (assumed to be 100% octane) is combusted in your car according to the following chemical reaction:
1.60 M solution(78.0 mL ) is diluted to a volume of 278 mL and a 139-mL portion of that solution is diluted using 175 mL of H 2 O ,water determine the final concentration?
Write a balance equations for both half-reactions for the redox. combine them to determine the overall balanced
a 1.00L buffer solution is 0.250 M in HF and 0.250 M in NaF. Calculate pH of the solution after the addition of 100.0mL of 1.00M HCl. Ka for HF is 3.5x10^-4
When heated, the DNA double helix separates into two random-coil single strands. When cooled, the random coils form the double helix
A 12 kg block of ice has a temperature of -10.0 degrees celsius. The pressure is one atmosphere. The block absorbs 4.50 times 10 to the sixth power J of heat. What is the final temperature of the liquid water?
Why are the bond angles of methane, ammonia, and water different for each even though the electron domain geometry is the same for each
The sulfur dioxide stack gas concentration from fossil fuel combustion is 2ppm(v). Determine the stack-gas concentration in units of micro grams/m^3 assume 0 degrees Celsius and1atm.
What are the potential advantages of a multienzyme complex compared to individual, non-complexed enzymes carrying out the same function
Determine how many moles of CO 2 would have to be combined at constant temperature and volume to increase the amount of CO to 0.300 moles?
The visible part of the hydrogen atom spectrum is called the Balmer series (n1 = 2). The violet line has a wavelength of 410.2 nm.
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