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Drain cleaner dissolves a hair clog in a bathroom drain. Is this a chemical or physical change?
of the metal ions we tested in the flame, sodium gave the brightest and most persistent color. Do you think that if a mixture of potassium and sodium were burned in a flame, the gross color of potassium could be detected in the presence of sodium
The Ksp for Cr(OH)3 is 1.6 x 10?30. What is the molar solubility of Cr(OH)3 in a buffer solution with a pH of 11.5. Hint: what is the balanced reaction
Is it possible for the activation energy of a reaction to be negative? Explain your conclusion and provide a molecular level explanation.
the average concentration of strontium ion in seawater is 8.00 mg of strontium ion per kg of seawater. what is the
how many grams of carbon dioxide (CO2) gas at are contained in a volume of 344 liters at STP?
The half-cell is a chamber in the voltaic cell where one half-cell is the site of the oxidation reaction and the other half-cell is the site of the reduction reaction.
what is the theoretical (or calculated) yield of NH4 Al (SO4)2 * 12 H2O formed from 1.872 g of Al(OH)3?Assume all other reagents are in excess
a 1.33 m solution of citric acid h3c6h5o7 in water has a density of 1.10 gcm3. calculate the mole fraction of the
Assign each species to the expression that most accurately describes the basic units of that substance.
Calculate the enthalpy change for the dissolution of NH 4 NO 3 and expree your answer in units of kJ/mol.
Erythrocytes phosphorylate glucose to glucose 6-phosphate with the help of the enzyme hexokinase instead of glucokinase. Hexokinase has a Km = 0.055 mM. How low would the blood glucose concentration have to fall to decrease the rate of glucose pho..
Suppose you burn exactly 1.50g of benzoic acid, C6H5CO2H, in a combustion calorimeter and find that the temperature of the calorimeter increases from 22.50 to 31.69°C.
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