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How much heat is gained when a piece of copper metal with a mass of 15 grams is heated from 20 degrees C to 75 degrees C? The specific heat of copper is 0.385 J/g degrees C
What is the pH of the resulting hydrochloric acid solution and 0.40 g of hydrogen chloride (HCl)is dissolved in water to make 6.0L of solution
At 25C, what is the hydroxide ion concentration, [OH-], in an aqueous solution with a hydrogen ion concentration of [H+]=2.7 x 10 ^ -6 M
A sample of air contains 78.08% nitrogen, 20.94% oxygen, 0.0500% carbon dioxide, and 0.930% argon by volume. how many molecules of each gas are present in 8.98 L of the sample at 87 degrees c and 6.45 atm
The volume of a gas is 5.0L when the temperature is 5.0C. If the temperature is increased to 10.0C without changing the pressure what is the new volume?
what mass of titanium displaces 65.2 ml of water at 25 circ rm
write the chem equation for the reaction which occurs when nickel metal is added to nitric acid.
An animal cell assumes its normal volume when it is placed in a solution with a total electrolyte molarity of 0.3 M. If the cell is placed in a solution with a total molarity of 0.6 M, then what happens
Using calorimetry experiment, how many grams of CaCl are required to cause a burn at 60 degrees celsius in 1000mL of water?
13When heated in a flame, sodium atoms emit light with a frequency of 5.09 × 1014 s-1. What is the wavelength of this radiation in nm? [Data: c = 2.998 x 108 m/s ]
we have a solution that contains 0.022 m ca2 and 0.014 m mg2. we will use potassium hydroxide to selectively
What is the pH of a buffer solution of phenol and its conjugate base. [C6H5OH] = 0.11 M and [C6H5O]- = 0.80 M.
A saturated solution of an unknown solid reacted with AgNO3 to give a pale yellow precipitate and also reacted with Pb(NO3)2 to give a white precipitate.
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