03/13/22

Does oxidization also mean burning in the presence of oxygen?
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03/12/22

Whats the solution?
A chemist measures the enthalpy change ΔH during the following reaction:Fe+2HCl→FeCl2+H2 ΔH=-157KJ Use this information to complete the table below. Round each of your answers to the... more
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03/12/22

Determine the number of moles of chromium atoms in 140.0 g chromium(III) oxide.
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03/12/22

Acid Base Equilibria and Buffer
The org‎anic ba‎ses cocai‎ne pKb = 8.412 and codeine pKb = 7.952 re‎act with hydroc‎hloric acid to form sal‎ts (similar to the formation of NH4Cl by the reaction of NH3 and HCl). If so‎lutions of... more
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03/12/22

For the following combination of reactants, enter the formulae of the products in the space provided and give their states. Fe2(SO4)3(aq) + CaCl2(aq)
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03/12/22

Whats the answer?

A chemist measures the enthalpy change ΔH during the following reaction:Fe+2HCl→FeCl2+H2 ΔH=-157KJ Use this information to complete the table below. Round each of your answers to the... more
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03/11/22

Hi, I need help answering this question. I know I need an ICE table, but I'm not sure where else to go from there.
1.    The chemistry stockroom has a solution of benzoic acid, C6H5CO2H, labeled “about 0.075 M.” The exact concentration needs to be determined before using the reagent in an experiment... more
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03/11/22

Whats the answer for this?
A chemist measures the enthalpy change ΔH during the following reaction:3CH3Br+NH3→(CH3)3N+3HBr ΔH=73KJ Use this information to complete the table below. Round each of your answers to the... more
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03/11/22

Calculate the substrate concentration when the initial velocity is 1/8th of Vmax. The km for its substrate is 10 mM.
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03/11/22

Calculate the substrate concentration when this an enzyme has a Vmax of 1.2 𝜇M s−1. The Km for its substrate is 10 𝜇M.
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03/11/22

Stoichiometry: Other Units
N2+3H2---> 2NH3 If we wish to make 20L NH3 How many grams N2 should we use at STP?
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03/11/22

Generic reaction help plz
Consider the generic reaction:2A+3B→C ΔHrxn= −115kJDetermine the amount of heat emitted when each amount of reactant completely reacts (assume that there is more than enough of the other... more
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03/11/22

A solution has an initial concentration of acid HA of 1.4 M. If the equilibrium hydronium ion concentration is 0.12 M, what is the percent ionization of the acid?
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03/11/22

Whats the process of solving this?
A chemist measures the enthalpy change ΔH during the following reaction:2Na+Cl2→2NaCl ΔH=-822KJUse this information to complete the table below. Round each of your answers to the... more
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03/11/22

Dont understand help plz
Determine the theoretical yield of  when each of the initial quantities of  and  is allowed to react in the generic reaction:2A+3B=2C? 3 mol A; 6 mol B? 4 mol A; 4 mol B
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03/11/22

How do you calculate this?
A chemist measures the enthalpy change ΔH during the following reaction:S8+24F2→8SF6 ΔH=-9672 kjUse this information to complete the table below. Round each of your answers to the... more
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03/11/22

The ionization constant of a weak base is Kb=6.0×10−7. What is the pH of an aqueous solution that contains 5.00×10−2M of this base?
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03/11/22

Combining 0.281 mol Fe2O3 with excess carbon produced 14.2 g Fe. Fe2O3+3C⟶2Fe+3CO What is the actual yield of iron in moles?

Combining 0.281 mol Fe2O3 with excess carbon produced 14.2 g Fe.Fe2O3+3C⟶2Fe+3COWhat is the actual yield of iron in moles?actual yield:__?__molWhat is the theoretical yield of iron... more
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03/11/22

A reaction of 44.7 g of Na and 55.1 g of Br2 yields 65.9 g of NaBr . What is the percent yield? 2Na(s)+Br2(g)⟶2NaBr(s)
A reaction of 44.7 g of Na and 55.1 g of Br2 yields 65.9 g of NaBr. What is the percent yield?2Na(s)+Br2(g)⟶2NaBr(s)percent yield:____?______%
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03/11/22

When 0.467 g of sodium metal is added to an excess of hydrochloric acid, 4850 J of heat are produced. What is the enthalpy of the reaction as written?

When 0.467 g of sodium metal is added to an excess of hydrochloric acid, 4850J of heat are produced. What is the enthalpy of the reaction as written?2Na(s)+2HCl(aq)⟶2NaCl(aq)+H2(g)Enthalpy of... more
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03/10/22

Please help!!Arrange the following atoms in order of decreasing atomic radius

NasLiSiBe
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03/10/22

Arrange the following elements in order of increasing ionization energy (lowest first)
Mg AlSClk
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03/10/22

melting, boiling, and freezing points of liquids
how do the melting, boiling, and freezing points of liquids differ? why?
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03/10/22

What are the answers from these letters below?
(a) 1 N hydrochloric acid = g hydrochloric acid(b) 1 M hydrochloric acid = g hydrochloric acid(c) 2 N phosphoric acid = g phosphoric acid(d) 2 M phosphoric acid = g... more
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03/10/22

How many grams of sulfuric acid are there are there in 4 mol sulfuric acid?
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