09/21/21

Does mixing vinegar and baking soda create a mechanical mixture or is a solution, if so, is it a synthesis reaction?
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09/20/21

Please balance the reaction, find the theoretical yield, estimated e-factor , atom economy

Please balance the reaction, find the theoretical yield, estimated e-factor , atom economy 8 Na2MoO4 + 12 HCl + 4 BnEt3N (+) Cl (-) ---> [BnEt3N] 4Mo8O26 + 16 NaCl + 6 H2O
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09/20/21

The reaction below has a Kp value of 59.6. What is the value of Kc for this reaction at 462 K?
N2(g) + 3 H2(g) ⇌ 2 NH3(g)
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09/20/21

When the system comes to equilibrium at a given temperature, PHI = 0.738 atm, and PH2 = PI2 = 0.08137 atm . What is the value of Kp at this temperature?

Hydrogen iodide gas decomposes to molecular hydrogen and iodine as shown in the equilibrium below.2HI (g)  H2(g) + I2(g).(Recall: Kp is an equilibrium constant written in terms of pressures rather... more
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09/20/21

What mass of zinc chloride is formed when 3.269 g of zinc reacts with excess hydrochloric acid? (Hint: first write a balanced chemical equation for the reaction).
I know the balanced equation is : Zn(s) + 2HCl (aq) -------> ZnCl2 (aq) + H2(g). What do I do after? The question is 3 marks.
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09/20/21

An oral suspension contains 50 gr therapeutic agent in a pint of the suspension. Calculate the quantity of therapeutic agent in milligrams present in a teaspoonful dose.
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09/19/21

General Chemistry I HW
How many moles of CaCO3 are there in an antacid tablet containing 0.500 g CaCO3? _______ mol CaCO3How many formula units of CaCO3 are in this tablet?_______ formula units
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09/19/21

What volume of a 0.177 molL−1 Na3PO4 solution is necessary to completely react with 93.1 mL of 0.113 molL−1 CuCl2?
the final answer has to be in ml
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09/19/21

A (g) + B (g) ⇌ 2 C (g) + D (g) initially contains 1.5 M A and 1.0 M B. equilibrium concentration of C is 0.55 M, equilibrium constant (Kc) for the reaction?
Consider the following reaction:A (g) + B (g) ⇌ 2 C (g) + D (g)A reaction mixture initially contains 1.5 M A and 1.0 M B. If the equilibrium concentration of C is 0.55 M, what is the value of the... more
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09/19/21

Determining a Chemical Formula
A 9.749 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis and 21.01 grams of CO2 and 8.601 grams of H2O are produced.In a separate experiment, the molar... more
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09/19/21

Isotopes and percent abundance

Element A has two naturally occurring isotopes. Percent abundance for isotope A-32 is (4.18x10^1) % and mass of 32.03 amu. Second Isotope A-35 has the mass 34.98 amu. What is the atomic mass of the... more
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09/19/21

General Chem I Chapter 3 HW

One mole of methane gas, CH4, has how many particles of methane? (Use three significant figures.) _________ particles CH43.75 moles of ammonia has how many particles of ammonia?__________
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09/19/21

How many 60 ml bottles of Lagundi Cough Syrup should be given to a 10-year old patient if the dose is 10 ml to be taken three times a day for 5 days?

Solve by usinga) ratio and proportionb) dimensional analysis
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09/19/21

A (g) + B (g) ⇌ 2 C (g) + D (g) initially contains 1.5 M A and 1.0 M B. equilibrium concentration of C is 0.55 M, what is the value of the equilibrium constant (Kc) for the reaction?
Consider the following reaction: A (g) + B (g) ⇌ 2 C (g) + D (g)A reaction mixture initially contains 1.5 M A and 1.0 M B. If the equilibrium concentration of C is 0.55 M, what is the value of the... more
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09/19/21

A2 (g) + B2 (g) ⇋ 2 AB (g) Kc is 116.4, initial concentrations are: [A2] = 0.200 M, [B2] = 0.200 M, [AB] = 0.270, what will be the equilibrium concentration of AB (in M)?
Consider the following equilibrium:A2 (g) + B2 (g) ⇋ 2 AB (g)If the value of Kc for this reaction is 116.4, and the initial concentrations of each species are: [A2] = 0.200 M, [B2] = 0.200 M, [AB]... more
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09/19/21

a) What molecule makes up the majority of 0.020 M LiF (aq)?

(M stands for molarity - moles/L). Hint: no math needed.b) What element makes up the majority of atoms, by mass?
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09/18/21

A sample of 7.39 g of liquid 1‑propanol, C3H8O, is combusted with 42.1 g of oxygen gas. Carbon dioxide and water are the products.
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09/18/21

Limiting Reactants: Comparison of Moles Method
For the following reaction, 147 grams of silver nitrate are allowed to react with 23.1 grams of copper .silver nitrate(aq) + copper(s)  copper(II) nitrate(aq) + silver(s)What is the maximum amount... more
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09/18/21

The maximum number of moles of C2H6 that can be obtained using 16.8 g of carbon C
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09/18/21

if the solubility of Agso4 is s mole×lit-1 then find the value of its ksp
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09/18/21

The mass percent of each gas in a mixture and the partial pressure of gases at a certain pressure.
The composition in volume percent of dry air at sea level is approximately 78.1% N2, 20.9% O2, 0.93% Ar, and 0.031% CO2. Calculate:a-     The mass percent of each gas in the mixture.b-    The... more
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09/18/21

2 A (aq) + B (aq) ⇌ C (aq) + D (aq) Kc 44.9, [A] = 0.772 M, [B] = 0.0339 M, and [C] = 0.782 M, what is the equilibrium concentration (in M) of D?
Consider the following reaction:2 A (aq) + B (aq) ⇌  C (aq) + D (aq)If the Kc for this equilibrium reaction is 44.9, and the equilibrium concentrations of A, B, and C are: [A] = 0.772 M, [B] =... more
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09/18/21

Mixed Gas Question 2
How many atm is the partial pressure of carbon dioxide in a container that holds 12.01 moles of CO2, 30.12 moles of N2 and 27.76 mole of H2 and has a total pressure of 2.6 atm? Answer with... more
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09/17/21

Stoichiometry of Reactions: Gram/Mole
According to the following reaction, how many moles of hydrogen gas will be formed upon the complete reaction of 27.2 grams of water ?water(l)  hydrogen(g) + oxygen(g)
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09/17/21

Stoichiometry of Reactions: Gram/Mole
Nitrogen monoxide is produced by combustion in an automobile engine.  According to the following reaction, how many grams of oxygen gas are necessary to form 0.582 moles nitrogen dioxide ?nitrogen... more
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