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1. Ibuprofen is an anti-inflammatory with the formula C13H18O2.
What is the molar mass of ibuprofen?
How many grams of ibuprofen are in 0.700 mole?
How many moles of carbon are in 13.5g of ibuprofen?
How many moles of ibuprofen contain 1.07×1023 atoms of carbon?
2. Iron(III) oxide reacts with carbon to give iron and carbon monoxide.
Fe2O3(s)+3C(s)------->2Fe(s)+3CO(g)
How many grams of C are required to react with 90.3g of Fe2O3 ?
How many grams of CO are produced when 39.0g of C reacts?
How many grams of Fe can be produced when 5.70g of Fe2O3 reacts?
1. What is the sum of the coefficients when the following is balanced 2. Cryolite is a compound needed for the Hall-Heroult process for aluminum. Cryolite is produced by the following reaction
Calculate the number of [CH2CHOH] monomer units in the average strand of PVA (78,000 g/mol).
What is the most important criteria for completing a successful recrystallization?
Problem- A student accidentally extracted the original solution with NaOH (aq) and the NaHCO3 (aq). When he acidified the NaHCO3 extract, no crystals formed.
What is the wavelength in meters of the photon emitted when this highly excited hydrogen atom of hydrogen makes its transition from the n = 9 to the n = 8 state
a student placed in an unknown sample plate thin layer chromatography and develops in dichloromethane as solvent. only there is a spot whose Rf is 0.95. This indicates that the unknown material is a pure compound
The complete conversion of 2-phenylacetic acid to ethyl-2-phenylacetate in this experiment is the result of. Ethanol being in excess relative to 2-phenylacetic acid
Question- For a certain reaction, the frequency factor A is 5.6 X 10(9) s -1 and the activation energy is 22.6 kJ/mol. What is the rate constant for the reaction at 81C
Allicin is the compound responsible for the characteristic smell of garlic. An analysis of the compound gives the following percent composition by mass: C: 44.4%; H: 6.21%; S:39.5%; O: 9.86%. Explain what is its empirical formula
An aerosol spray can with a volume of 250 mL contains 2.30 g of propane gas C3H8 as a propellant. If the can is at 25deg C, what is the pressure in the can
A galvanic cell is constructed with a silver-silver chloride electrode, and a nickel strip immersed in a beaker containing 6.49 x 10-2 M solution of NiCl2.
The nucleus X in which A= 200 emits alpha particles of kinetic energy 5.000 MeV. Calculate (a) the velocity of the alpha particles in cm/ns, (b) the kinetic energy of the recoil nucleus in MeV, and (c) the Q value of the alpha emission in MeV. Neg..
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