Questions
When 0.873 g of neon is added to an 700-cm3 bulb containing a sample of argon, the total pressure...

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...

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.

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Predict the kind various of copolymer and polymerization mechanism of depending on the reactivity ratio of...

Predict the kind various of copolymer and polymerization mechanism of depending on the reactivity ratio of
Nitro ethylene and propylene

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If fermentation did not occur during anaerobic metabolism, glycolysis would come to a screeching halt. Why?

If fermentation did not occur during anaerobic metabolism, glycolysis would come to a screeching halt. Why?

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What is the cell potential for the reaction Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s) at 43 ∘C when [Fe2+]= 3.10 M...

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

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You are given a sample of several compounds to separate by paper chromatography. You draw a...

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?

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Predict the following to be primary secondary or tertiary: Hexane if insoluble in water. 1-Hexene if...

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.

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1. What is the purpose of the TMS or DSS which is added to the NMR...

1. What is the purpose of the TMS or DSS which is added to the NMR solvents?

2. What would you do if your NMR sample contained solid particulate matter (as a contaminant)?

3. Why is it necessary to wipe the bottom of an NMR tube before you placed it into the spectrometer?

4. Why do NMR spectrometers spin the tube inside of the magnet?

5. What is shimming?

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Write the electron configurations for the following ions, and determine which have noble-gas configurations. A) Ru...

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+

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When 1.90 mol CO2 and 1.90 mol H2 are placed in a 3.00-L container at 395...

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?

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at 1 arm, how many energy is required to heat 35.0g of water (s) at -22.0...

at 1 arm, how many energy is required to heat 35.0g of water (s) at -22.0 degree to water (g) at 131.0 degree Celsius?

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During a titration, a student used 31.92 ml of a .1000 M NaOH (aq) to neutralize...

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.

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1. Consider the following reaction: 3CH4(g)→C3H8(g)+2H2(g) Calculate ΔG at 298 K if the reaction mixture consists...

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...

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

Substance Ksp at 25 oC
Aluminum
Al(OH)3 1.9 x 10-33
Barium
Ba(OH)2 5.0 x 10-3
BaCO3 8.1 x 10-9
BaSO4 1.1 x 10-10
Ba3(PO4)2 3.4 x 10-23
Cadmium
Cd(OH)2 2.5 x 10-14
CdCO3 5.2 x 10-12
CdS 8.0 x 10-27
Calcium
Ca(OH)2 5.5 x 10-6
CaCO3 4.8 x 10-9
Ca3(PO4)2 1.0 x 10-26
CaF2 3.9 x 10-11
Chromium
Cr(OH)3 6.3 x 10-31
Cobalt
Co(OH)2 1.6 x 10-15
CoS 4.0 x 10-21
Copper
Cu(OH)2 2.2 x 10-20
Cu2S 1.6 x 10-48
CuCO3 1.4 x 10-10
CuS 6.3 x 10-36
Iron
Fe(OH)2 8.0 x 10-16
FeS 6.3 x 10-18
Fe(OH)3 2.5 x 10-39
FePO4 9.9 x 10-29
Lead
Pb(OH)2 2.8 x 10-16
PbF2 3.7 x 10-8
PbCl2 1.7 x 10-5
PbBr2 6.3 x 10-6
PbI2 6.5 x 10-9
PbCrO4 1.8 x 10-14
PbSO4 1.7 x 10-8
PbS 8.4 x 10-28
Magnesium
Mg(OH)2 1.8 x 10-11
Manganese
Mn(OH)2 1.9 x 10-13
MnCO3 8.8 x 10-11
MnS 5.6 x 10-16
Nickel
Ni(OH)2 1.6 x 10-14
Silver
AgCl 1.8 x 10-10
AgBr 5.0 x 10-13
AgI 8.3 x 10-17
AgCN 1.2 x 10-16
Ag2S 6.3 x 10-50
Ag2CrO4 1.1 x 10-12
Ag3PO4 2.6 x 10-18
Tin
Sn(OH)2 1.4 x 10-28
SnS 1.3 x 10-23
Zinc
ZnCO3 1.0 x 10-10
Zn(OH)2 4.5 x 10-17
ZnS 1.1 x 10-21

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A sample of ammonia gas is completely decomposed to nitrogen andhydrogen gases over heated iron wool....

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