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09/09/24

Resonance structures for given molecules

What are the possible resonance structures for each of the 3 molecules given in the image attached;https://ibb.co/HGbx41K

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Chemistry

09/09/24

New Chemistry student.

I'm having some issues understanding the processes and what everything means when it comes to solving problems, if someone could offer some assistance with this question i'd be very grateful.*How... more

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Chemistry Organic Chemistry

09/07/24

Regarding electrons and their quantum numbers

1. What would be the maximum number of electrons in a given atom that can occupy each of the following?(a) n = 3 shell (c) 2p orbital(b) 2pz orbital (d) 2d orbital2. How many electrons in a given... more

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Chemistry Organic Chemistry

09/07/24

Regarding the recrystallization of benzoic acid

Why is water a good solvent for the recrystallization of benzoic acid? If charcoal and sugar were present in crude benzoic acid, would recrystallization from water be a good method of... more

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Chemistry

09/06/24

A technical machinist is asked to build a cubital steel tank that will hold 185 L of water. Calculate in meters the smallest possible inside length of the tank. Round your answer to the nearest 0.01 m

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Chemistry

09/03/24

3. If 25.5 g H2 are made to react with 64.2 g N2, what is the limiting reagent? 3H2(g) + N2(g) → 2NH3(g)

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Chemistry

09/02/24

3. The density of a liquid is 0.785 g/mL at 25 degrees Celsius. Convert it into kg/L. Show your unit cancellation setup for the conversion. This is a harder one. Hint: 1 kg = 1000 g, 1 L = 1000 mL.

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Chemistry

08/28/24

the change in heat (q) when 30 grams of copper melt.

Determine the change in heat (q) when 30 grams of copper melt. ( Lf = 205 J/g Lv = 4807 J/g )

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Chemistry

08/27/24

chemistry I dont get it

A physician ordered a dose: of cimetidine at 0.6 g the dose available is 200 mg/tablet how many tablets should be administrated?

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Chemistry

08/23/24

Ap Chemistry Crucible lab

A student heats up a crucible and in the end after doing the math, the hydrate is 1.51 g, the dehydrate is 0.98 g and the water lost is 0.53g. This needs to be converted into moles of Copper (II)... more

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Chemistry

08/19/24

A graduated cylinder contains 49.72 mL of water. What is the new water level, in mL, after 25.6 g of a metal with a density of 8.21 g / mL is submerged in the water?

Please do not forget significant figures and units!

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Chemistry Physics

08/16/24

Physics 1 question on finding density of copper cube

A copper cube with density 8.96 ✕ 103 kg/m3 and mass 20.0 kg at 29.0°C is heated to 150°C.What is the density of the copper cube at this new temperature? (Give your answer to at least three... more

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Chemistry

08/08/24

working out enthalpy change for C(s) + 2H2O(g) ⇌ CO2(g) + 2H2(g)

C(s) + 2H2O(g) ⇌ CO2(g) + 2H2(g) work out the enthalpy change for this equation with the following information.C(s) + O2(g) → CO2(g) =-393.5kjmol-1 H2(g) + ½ O2(g) → H2O(g)= -241.8 kjmol=1

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Chemistry

08/05/24

Setting up a unit reprefix conversion

(0.030 N/cm) x ? =? N/mm

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Answers •3

Chemistry

08/05/24

Any one interested to learn chemistry?

From 9to 11 std.

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Chemistry

08/05/24

horizontal vertical stretch/compression of metal bonded to ligands in octahedral energy level effect

why do the energy levels of the d-orbitals reorder in the way they do when you modify a octahedral ligand configuration already with e_g and t2g(crystal field) and move the ligands on the square... more

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Chemistry Physics

08/03/24

Why is dimensional analysis useful?

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Chemistry

07/28/24

What is the pH of a 0.15-M Ca(CH3CO2)2 solution? Note: CH3COOH ; Ka = 1.8 x 10 -5

Please solve this question! The answer that I got was 9.11 and I want to ensure I am correct. Some of my work is below:Ca 2+ 2 CH3COO- + H2O <––> CH3COOH + OH-Kw = 1.0 x 10^-14Kw = (Kb)... more

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Chemistry

07/27/24

Who is father of the modern chemistry?

Modern civilization owes him too much appreciation for some of his postulates.

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Chemistry

07/26/24

stoichiometry help

1.) how many grams of Fe2O3 can form from 29.2 grams of O2? 2.) show the strategies for solving this problem (the question gives: Grams O2———>_______———>_______———> grams Fe2O3)3.) show... more

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Chemistry Biochemistry

07/24/24

Help with this one!

1.) Suppose trypsin lowers the standard enthalpy (∆H o҂) of the transition state by 4.8 kcal/moland increases the standard entropic favorability (∆So҂) of the transition state by 20 cal/mol*K. What... more

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Chemistry Biochemistry

07/24/24

I need help with these questions!!

Two proteins, Pepperoni (Pe) and Pizza (Pi) bind to each other with a K D value of 3.4uM 1.) Assume that Pepperoni binds to Pizza independently. If [Pizza] = 1uM, what is the concentration of... more

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Chemistry

07/22/24

Chemistry Grade 12 Question: I did half but I don't know the oxidizing agent...

Question: Aqueous hydrogen peroxide and aqueous iron (III) nitrateHint: This system is not acidified.Species List: H2O(l), H2O2(l), Fe2+(aq),NO3-(aq)Oxidizing Agents: Reducing Agents: H2O(l),... more

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Chemistry

07/20/24

answer with appropriate units

How many grams of copper react to give 1.20 g of Ag?Cu(s)+2AgNO3(aq)→Cu(NO3)2(aq)+2Ag(s)

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Chemistry Chemical Engineering

07/17/24

Birkeland-Eyde process

I have a question about the Birkeland-Eyde process, more specifically on a smaller scale. I know that at 3000 degrees celsius you can produce nitrogen dioxide. I am interested in how this works.... more

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Resonance structures for given molecules

New Chemistry student.

Regarding electrons and their quantum numbers

Regarding the recrystallization of benzoic acid

A technical machinist is asked to build a cubital steel tank that will hold 185 L of water. Calculate in meters the smallest possible inside length of the tank. Round your answer to the nearest 0.01 m

3. If 25.5 g H2 are made to react with 64.2 g N2, what is the limiting reagent? 3H2(g) + N2(g) → 2NH3(g)

3. The density of a liquid is 0.785 g/mL at 25 degrees Celsius. Convert it into kg/L. Show your unit cancellation setup for the conversion. This is a harder one. Hint: 1 kg = 1000 g, 1 L = 1000 mL.

the change in heat (q) when 30 grams of copper melt.

chemistry I dont get it

Ap Chemistry Crucible lab

A graduated cylinder contains 49.72 mL of water. What is the new water level, in mL, after 25.6 g of a metal with a density of 8.21 g / mL is submerged in the water?

Physics 1 question on finding density of copper cube

working out enthalpy change for C(s) + 2H2O(g) ⇌ CO2(g) + 2H2(g)

Setting up a unit reprefix conversion

Any one interested to learn chemistry?

horizontal vertical stretch/compression of metal bonded to ligands in octahedral energy level effect

Why is dimensional analysis useful?

What is the pH of a 0.15-M Ca(CH3CO2)2 solution? Note: CH3COOH ; Ka = 1.8 x 10 -5

Who is father of the modern chemistry?

stoichiometry help

Help with this one!

I need help with these questions!!

Chemistry Grade 12 Question: I did half but I don't know the oxidizing agent...

answer with appropriate units

Birkeland-Eyde process

Still looking for help? Get the right answer, fast.

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