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A 0.1946 g piece of magnesium metal is burned in a constant volume calorimeter that has a heat capacity of 1349 J/°C. The calorimeter contains 500 g of water and the temperature rise is 1.40°C. Calculate the heat of combustion of magnesium metal in kJ/g.
How many mL of 4.50 M sodium hydroxide must be added to 250 mL of a 0.200 M nitrous acid solution to make a buffer with pH = 3.00?
what is the K value for compound Z in this biphasic system, (2) how much do you remove in each individual extraction, (3) how much of compound Z is extracted with those three 33.3 mL extractions added together, AND (4) how much is still in the wat..
If a buffer solution is 0.230 M in a weak acid (Ka = 3.8 × 10-5) and 0.410 M in its conjugate base, what is the pH
How many carbon atoms are present in the smallest ketone which cannot exhibit enol-keto tautomerism
aqueous solution of 0.110 m of a weak acid ha is 1.80 ionized. determine at what temperature does this solutionaq
calculate the mass of nitrogen dissolved at room temperature in an 77.0 home aquarium. assume a total pressure of 1.0
The valence shell of the element X contains 2 electrons in a 5s subshell. Below that shell, element X has a partially filled 4d subshell. What type of element is X?
Calculate the mole fraction of each gas. Be sure each of your answer entries has the correct number of significant digits.
The molar heat capacity of silver is 25.35 J/mol (degrees C). How much energy would it take to raise the temperature of 11.8g of silver by 16.2 degrees C
Calculate the weight of precursor salt needed to make 500 ml of a 2 M aqueous solution of the metal ion from each salt.
A sample of a gas originally at 29°C and 1.25 atm pressure in a 3.0 L container is allowed to contract until the volume is 2.2 L and the temperature is 11°C.
Intravenous medications are oftend administered in 5.0% glucose by mass. what is the osmotic pressure of such solutions at 37 C? assume that the density of the soloution is 1.0 g/mL.
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