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calculate the molecular mass of a solute with 8.02 grams of solute in 861 grams of water lower the freezing point to -.430 degree Celsius.
A first order decomposition reaction has a rate constant of 0.0418yr-1. What is the half-life of the reaction in yr
Write the chemical equation for the dissociation of the salt into its ions. Write the expression for Ka or Kb and give the value of Ka or Kb 1. 1.0M NaC2H3O2 pH=7.45 2. 1.0M NaHCO3 pH=8.60 3. 1.0M Na2CO3 pH=11.62 4. 1.0m NH4Cl pH=3.98
What changes would I make in my experimetal procedure to determine the rate law for the oxidation of red dye by sodium hypochlorite
a 62g piece of ice at 0 degree celsius is added to a sample of water at 9 degree celsius. all of the ice melts and the
one beaker contains pure water and the other beaker contains pure methanol at the same temperature. Which liquid has the higher surface tension and viscosity
A laser pulse with wavelength 555nm contains 4.40mJ of energy. How many photons are in the laser pulse.
Aluminum metal is formed by the electrolysis of Al2O3 in molten cryolite. How many grams of Al are produced when 6.50 x 10^3 C pass through the cell
An experiment requires 40.0 of ethylene glycol, a liquid whose density is 1.114 . Rather than weigh the sample on a balance, a chemist chooses to dispense the liquid using a graduated cylinder. What volume of the liquid should he use?
A 6.52 g mass of a metal was heated to 103.88°C and then plunged into 100.0 g of water at 24.73°C. The temperature of the resulting mixture became 28.28°C.
Converting Grams and Moles, To do this assignment, use your calculator to do the calculations required. Then invert the calculator to read the message word. Insert the message word into the appropriate space in the statement
Describe how you would prepare 500mL of a single solution containing 250mM Tris, 50mM glucose, and 5mM NaCl.
a solid block of exactly 100.0 cm3 has a mass of 153.6g. Determine its density. will the block sink or float in water
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