When 0.873 g of neon is added to an
700-cm3 bulb containing a sample of argon, the total pressure
of the gases is found to be 1.73atm at a temperature of
298 K .
Find the mass of the argon in the bulb.
In: Chemistry
A doctor prescribed magnesium oxide as a health supplement. Assuming that a capsule contains 400mg magnesium oxide, determine the number of unit cells of magnesium.
In: Chemistry
Predict the kind various of copolymer and
polymerization mechanism of depending on the reactivity ratio
of
Nitro ethylene and propylene
In: Chemistry
If fermentation did not occur during anaerobic metabolism, glycolysis would come to a screeching halt. Why?
In: Chemistry
What is the cell potential for the reaction
Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s)
at 43 ∘C when [Fe2+]= 3.10 M and [Mg2+]= 0.110 M .
E=____V
In: Chemistry
You are given a sample of several compounds to separate by paper chromatography. You draw a pencil line exactly 1.0 cm from the bottom of the paper, and place a spot of sample on it. You dry the sample, then develop it in a solvent.
When the chromatogram is taken out of the solvent, the paper is wet up to 9.0 cm from the bottom of the sheet. The compound you are interested in shows up as a spot 7.3 cm from the bottom of the paper.
Calculate the following:
How far did the compound move?
In the same time, how far did the solvent move?
What is the Rf factor for the compound?
In: Chemistry
Predict the following to be primary secondary or tertiary: Hexane if insoluble in water. 1-Hexene if insoluble in water but tests positive for a Br2 test. 1-bromobutane if insoluble in water but tests positive for a AgNO3. Ethanol and cyclohexane if they both tests postive for a Lucas test. and finally Ether if it tests negative for a Lucas test.
In: Chemistry
In: Chemistry
Write the electron configurations for the following ions, and determine which have noble-gas configurations.
A) Ru 3+ B) As3- C) Y3+ D) Pd2+ E) Pb2+ F) Au3+
In: Chemistry
When 1.90 mol CO2 and 1.90 mol H2 are placed in a 3.00-L container at 395 ∘C, the following reaction occurs: CO2(g)+H2(g)⇌CO(g)+H2O(g).?
Part A
If Kc = 0.802, what are the concentrations of CO2 in the
equilibrium mixture?
Part B
If Kc = 0.802, what are the concentrations of H2 in the equilibrium
mixture?
Part C
If Kc = 0.802, what are the concentrations of CO in the equilibrium
mixture?
Part D
If Kc = 0.802, what are the concentrations of H2O in the
equilibrium mixture?
In: Chemistry
In: Chemistry
During a titration, a student used 31.92 ml of a .1000 M NaOH (aq) to neutralize 30.0 ml of a . 2488 M oxalic acid solution.
In: Chemistry
1. Consider the following reaction:
3CH4(g)→C3H8(g)+2H2(g)
Calculate ΔG at 298 K if the reaction mixture consists of 41 atm of CH4, 0.011 atm of C3H8, and 2.1×10−2 atm of H2.
Express the Gibbs free energy in kilojoules to two significant digits.
2. The element gallium (Ga) freezes at 29.8 ∘C, and its molar enthalpy of fusion is ΔHfus = 5.59 kJ/mol.
Calculate the value of ΔS when 61.0 g of Ga(l) solidifies at 29.8 ∘C. in J/K
In: Chemistry
What is the molar solubility of Fe(OH)3 in a solution
buffered at pH = 4.52? (See the appendix.)
M
What is the molar solubility at pH = 8.16?
M
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In: Chemistry
A sample of ammonia gas is completely decomposed to nitrogen andhydrogen gases over heated iron wool. If the total pressure is 639mmHg, calculate the partial pressure of N2 and H2. Enter your answers in scientific notations
In: Chemistry