08/18/21

What is the difference between molecular and ionic compounds and how these groups of compounds are related to strong and weak electrolytes?
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08/17/21

Chemistry Calculations

3. The blood serum acetone level for a person is determined to be 1.8 mg of acetone per 100 mL of serum. Express this concentration as % (v/v) is liquid acetone has a density of 0.79 g/mL. 4.... more
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08/17/21

Calculate Molarity and Concentration
1. Calculate the molarity of the following solutions: a. A sample of solid KBr weighing 8.90 g is put in enough distilled water to give 200.0 mL of solution. b. A 24.9 g sample of NaCl is dissolved... more
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08/17/21

Vanadium metal, V, which is used in steel alloys can be obtained by reacting vanadium(V)oxide, V2O5,with calcium, Ca, at high temperature : 5Ca(s) + V2O5(s) → 5CaO(s) + 2V(s)
When 1.71 x 103 g of an impure sample of calcium reacts with 1.01 x 102 g of vanadium(V)oxide, 50.0 g of vanadium was yielded. [Ar V: 50.94 g mol-1]a) Calculate the number of moles of vanadium... more
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08/17/21

A sample of 1.55 g of iron ore is dissolved in an acid solution in which the iron is converted into Fe2+.
The solution formed is then titrated with KMnO4 which oxidises Fe2+ to Fe3+ while the MnO4 - ions are reduced to Mn2+ ions. 92.95 mL of 0.020 M KMnO4 is required for the titration to reach the... more
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08/15/21

Please help me determine the equilibrium constant for keq:
What would be the equilibrium constant for keq with the following given information?[N2(g)]=2.0x10-4 mol/L[H2(g)]=4.0x10-3 mol/L[NH3(g)]=2.2x10-4 mol/L
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08/14/21

(a) Calculate the mass of CaCO3 required to react completely with 25mL of 0.75 M HCl. (b) Calculate volume of CO2 released at STP in this reaction
Answer nicely with the calculations showing by the side. In big or clear handwriting so it can be understandable. Thank u:)
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08/13/21

How many grams of oxygen are required to react with 200 grams of octane (C_{8}*H_{18}) in the combustion of octane in gasoline?
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08/12/21

If co2 is being produced in the solution at a faster rate than h2co3 is the rate of the forward or reverse reaction faster?
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08/12/21

How long is the reaction time for the production of sodium sulfate by the reaction of calcium sulfate with sodium nitrate?
I want to react sodium sulfate and calcium nitrate by reacting calcium sulfate with sodium nitrate, but how long should the reaction time be?
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08/11/21

Chemistry question, help
Distinguish between the following: 4.1.1 Reaction order and molecularity. 4.1.2 Catalyst and intermediate with regard to elementary steps. 4.1.3 Homogeneous catalysis and heterogeneous catalysis.
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08/11/21

Chemistry question, please help
QUESTION 33.1 The following mechanism has been proposed for the gas – phase reaction of hydrogen (H2) and iodine monochloride (ICl):H2(g) + ICl(g) → HI(g) + HCl(g) HI(g) + ICl(g) → I2(g) +... more
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08/11/21

Not sure what it is asking or how to complete
Assuming that no equilibria other than dissolution are involved, calculate the concentration of all solute species in each of the following solution of salt in contact with a solution containing a... more
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08/11/21

Find the ions in this soulution
50mL of 0.20mol L^-1 sodium hydroxide was mixed with 50ml 0.30mol L_1 magnesium chloride to form a precipitate of magnesium hydroxide. calculate the concentration of sodium ions magnesium ions and... more
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08/10/21

How many milliliters of 2.75 M Ca(OH)2 is needed to completely neutralize 0.198 L of 2.03 M H3PO4. Make sure your answer has the correct number of significant figures.
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08/10/21

How many L of 0.351 M NaOH is needed to completely neutralize 1.25 L of 0.444 M H2SO4 . Make sure your answer has the correct number of significant figures.
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08/10/21

Chemistry question on rate laws
For the second order reaction: 2C4H6(g) → C8H12(g) If 35.0% of 0.100 mol.dm–3 initial concentration has reacted after 2.00 hours, what is the half–life for the reaction?
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08/10/21

Chemistry question on rate laws
The rate constant for the decomposition of hydrogen iodide (HI) at 700oC equals 0.00160 M–1 .s–1 : 2HI(g) → H2(g) + I2(g)1) Based on the units of the rate constant, is the reaction first order or... more
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08/10/21

Chemistry question on rates law
Consider the following reaction of the peroxydisulphate ion (S2O8 2– ) with iodide ion (I– ) in aqueous solution: S2O8 2– (aq) + 3I – (aq) → 2SO4 2– (aq) + I3 – (aq) At a particular temperature,... more
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08/10/21

How many grams of hydrogen are produced from 3.7 grams of aluminum? (Al + H2SO4 --> Al2(SO4)3 + H2 )
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08/10/21

If the percentage yield of this reaction is 80%, calculate the mass of magnesium that needs to be burned to produce 30g of magnesium oxide
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08/08/21

Chemical Equilibrium
At equilibrium, a 1.0 liter container was found to contain 0.20 moles of A, 0.20 moles of B, 0.40 moles of C and 0.40 mole of D. If 0.10 moles of A and 0.10 moles of B are added to this system,A(g)... more
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08/06/21

calculate the volume of ethene measured at room temperature and pressure which reacts to produce 1.0dm^3 of ethanol
steam is reacted with ethene according to this equation: C2H4 + H2O --> C2H5OHethanol has a density of 0.8kg/dm^3.(Ar: C, 12; H, 1; O, 16.)(at room temperature and pressure 1 mole of any gas has... more
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08/05/21

What is the structural formula for propene and hydrogen gas? As well as the type of reaction and product(s)?
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08/05/21

What is the structural formula for hexane and oxygen gas? As well as the type of reaction and product(s)?
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