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A gaseous mixture of O2 and N2 contains 39.8% nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 645 mmHg?
Combustion of 7.20 g of this compound produced 14.4 g of CO2 and 5.89 g of H2O. What is the emperical Formula of the unknown compound?
Aspirin that has been stored for a long time may give a vinegar odor and give a purple color with FeCl3, what reaction would cause this to happen
What are the net ionic equations for the redox reactions
aliquot of 0.0529 m H2SO4 (aq) is to be titrated with 0.0411 m NaOH (aq). What Volume (mL) of base will it take to reach the equivalence point?
50.00ml of BiO3- is titrated with 26.43ml 0.02982M Fe2+. What is the molar concentration of BiO3-? How many mg of NaBiO3 were in the 50.00ml sample? [BiO3-] = _______________ M mNaBiO3 = _______________ mg
Identify all of the substances that are used or produced in this experiment A5. Distinguish between elements and compounds.
What is the name of the compound (NH4)3PO3? Why is special about this compound? Choose one answer. a. Ammonium phosphate; this covalent compound is made up of two polyatomic ions, ammonium and phosphate.
Question : Explain and show how you would sythesise the following compounds, starting with benzene or toluene and any necessary acyclic reagents. Assume para is the major product.
In a titration, 0.0 mL of 0.025 M hydrochloric acid is added to 30.0 mL of 0.030 M ammonia. What is the pH of the resulting mixture?
The melting point of water is 0.000C at 1 atmosphere. If 11.64 grams of chromium(II) acetate, (170.1 g/mol), are dissolved in 287.2 grams of water .what is the molarity?
an undergraduate researcher in a biology lab produced a buffer solution by dissolving sodium dihydrogen phosphate (Ka = 6.2 × 10-8) and sodium hydrogen phosphate (Ka = 3.6 × 10-13) together in an aqueous solution. What mole ratio of Na2HPO4/NaH2PO..
The lower flammability limit (LFL) for a gas is the minimum concentration of the gas, in air, below which there is too little fuel to support combustion.
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