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A 247.7mg sample of an unknown substance was submitted for combustion analysis. The sample yielded 632.64 mg of Carbon dioxide and 259.04mg of water. 1) What is the empirical and molecular formular of this unknown substance?
consider the reaction 4 fes 3 o2g rarr 2 fe2o3s.if 12.5 g of ironiii oxide rust are pro- duced from 8.74 g of iron how
Does the carbocation intermediate in the hydrolysis of 2-bromo-3-methylbutane rearrange by way of a hydride shift, methyl shift, or neither
To measure calcium in breakfast cereal, 0.5216g of crushed Cheerios were ashed, dissonved in 6M HCl, quantitatively transferred to a volumetric flask, and diluted to 100.0mL. A 5.00mL aliquot of the cereal solution had an absorbance of 0.151AU whe..
Marble (calcium carbonate) reacts with hydrochloric acid solution to form calcium chloride solution, water, and carbon dioxide.
solid aluminum reacts according to the balanced equation. if a total of 830 kj of heat is produced in the reaction as
Draw the lewis structures for each of the following molecules or ions. Which do not obey the octet rule? (a)NO (b) AlH3 (c) ICl2^- (d) OPBr3 (the P is the central atom) (e) XeF4
Standard reduction potentials are given on the next page. (a) Draw a diagram of the electrochemical cell, labeling all electrodes and solutions. (b) What is the pH in the Pt | H+ | H2 half-cell? (c) What is the value of the equilibrium constant fo..
Name and provide the structure of the major organic product which results when (R)-3,3-dimethyl-2-butanol is heated in the presence of HBr.
when the concentration of epinephrine or glucagon is high, they bind to receptors on adipose cell membrane and all of the following can be expected to occur
A typical protein contains 16.2 wt% nitrogen (N). A 0.500 mL sample of protein solution was decomposed, and the liberated ammonia (NH3) was reacted with 10.00 mL of 0.02140 M HCl.
which reaction has the greatest increase in entropya. 2h2o-gt 2h2 o2b. 2h2o-gt 2h2 o2c. h2og-gt h2old. h2ol-gt
The reaction below reaches equilibrium in a closed reaction vessel. The enthalpy change for the forward reaction is +135 kJ/mol. Does the mass of Na 2 CO 3 increase, decrease or stay the same if the mixture is transferred to a smaller reaction ves..
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