1. Why should solid NaOH be weighed on a watch glass and not on a paper?

Q: Aqueous hydrochloric acid (HC1) reacts with solid sodium hydroxide (NaOH) to produce aqueous sodium ...

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Q: Use MO theory to explain the following: - TT 2p 2р, 2р, 2р, 2р, 2px 2ру 2pz 2px 2Py 2pz 2px 2py TT2P...

A: Ionization energy is the energy required to eliminate one electron from Highest occupied molecular o...

Q: At the freezing point of water, Kw = 1.2 x 1015, What is the pH of ice water?

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Q: _and 2- Gravimetric analysis have two method. 3- In titration method can be calculated of known conc...

A: Molecular Weight: molecular weight can be evaluated from the individual weight of all the elements t...

Q: When the following skeletal equation is balanced under acidic conditions, what are the coefficients ...

A: Cofficient - 1,1,1,1 Water.....(neither) (0) Reducing species ( Mn) 

Q: Calculate the number of oxygen atoms in a 60.0 g sample of diphosphorus pentoxide (P,O,). Be sure yo...

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Q: In a multi-step reaction pathway, the step is the rate-limiting step. (A) (B) Fastest Slowest

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Q: identify the conjugate acid and con jugate base   CH3COO- + HCl ⇄ Cl- + CH3COOH

A: CH3COO^- + HCl -> Cl^- + CH3COOH  

Q: 2. Synthesis (use as many boxes as needed, excess are provided)

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Q: at mass of

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Q: Liquid octane (CH,(CH,) CH,) reacts with gaseous oxygen gas (0,) to produce gaseous carbon dioxide (...

A: Given: Mass of octane=4.57 g Mass of oxygen gas=12.0 g Mass of water produced (Obtained yield) =2.38...

Q: 51.0 g of Y(g) (molar mass = 28.32 g/mol) is placed in a 0.617 L flask for the following reaction to...

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Q: Question 3- - Use MO theory to explain the following: Zp, 2p. 2p, 2p, 2p. 2p, 2p, 2p. 2p, Zp, 2p. 2p...

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Q: Calucate the atomic mass: Titanium: Ti-46 (7.9 %), Ti-47 (7.3 %), Ti-48 (73.9 %), Ti-49 (5.5 %), Ti-...

A: Given data : Ti-46 = 7.9 % Ti-47 = 7.3 % Ti-48 = 73.9 % Ti-49 = 5.5 % Ti-50 = 5.4 %

Q: Lewis structure name of highlighted group :0: Н—С— Н H :0: Н — С — С — О — Н .. H. :N=C- N –H н нн

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Q: What is the calculated value of the cell potential at 298K for an electrochemical cell with the foll...

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Q: This question is based on the five compounds (A-E) given below. (A) CH;-CH=CH, (B) CH;-CHBR-CH2-CH3 ...

A: Let us discuss one by one.

Q: For the following two compounds, the given names do not correctly follow IUPAC naming conventions. F...

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Q: 5C,H,(g)+3 CO,(g)+4H," the net chemical equation fe

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Q: A mixture of krypton and oxygen gas is compressed from a volume of 92.0 L to a volume of 27.0 L, whi...

A: Given data, V1=92.0 L V2=27.0 L  Pext. =90.0 atm  then,  

Q: 3- Calculate the final volume at 302 K of a 5.41 L sample of gas originally at 353 K if the pressure...

A: Given values, V1= 5.41 L , T1= 353 K V2= ? , T2=302 K

Q: 1) Predict the balanced ionic formula for calcium citrate: 2) Balance the precipitation reaction bel...

A: The balanced chemical equations has been provided.

Q: The decomposition of phosphene (COCI2) gas into carbon monoxide (CO) and chlorine (Cl2) gases is ver...

A: Given reaction is  COCl2 (g) <--> CO (g) + Cl2 (g)  Equilibrium constant , Kp = 1.32×10-8 Init...

Q: Find the ∆H for the reaction below, given the following reactions and subsequent ∆H values: H2SO4 (l...

A: Thermodynamics is branch of chemistry in which we deal with amount of heat absorbed or evolved durin...

Q: You were asked to determine the acid content of vinegar and soda samples. You performed a simple aci...

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Q: Gaseous butane (CH;(CH,),CH;) reacts with gaseous oxygen gas (02) to produce gaseous carbon dioxide ...

A: Reaction:-  CH3(CH2)2CH3(g)  + O2(g) ----> CO2(g)  + H2O(g)  Balanced chemical reaction:-  2C4H10...

Q: A mixture of nitrogen and argon gas is expanded from a volume of 69.0 L to a volume of 89.0 L, while...

A: Given data, Pressure P = 55.0 atm Initial volume = 69.0 L  Final volume = 89.0 L  work done = ?

Q: 1.0 x 10-11 moles of HCl are added to 1.OL of H20. What is the pH? О 3.0 O 10.0 O 11.0 О 1.0 O 7.0

A: Moles of HCl = 1.0 × 10-11 moles Volume of water = 1.0 Liter

Q: 1) HCI (1 eq.) F) Br CI 2) HBr (1 eq.) Major Minor Br G) EIOH Diene Dienophile CO,Me H) Нeat CO,Me A...

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Q: Solid aluminum (Al)and oxygen (0,) gas react to form solid aluminum oxide (Al,0,). Suppose you have ...

A: Limiting reagent is the reagent which controls the reaction. When total amount of limiting reagent i...

Q: T:E3 → E2

A: In this question we have to prove if the Ker T where T:E3 → E2 by T((x1,x2,x3)) = (x1 + x2, x2 - x3)...

Q: e enthalpy change (AH) of a reaction is the transition state. Directly proportional to Independent o...

A: Enthalpy change of a reaction is the difference between the enthalpy of the product and the enthalpy...

Q: What amount of heat, in kJ, is required to vaporize 115.00 g of ethanol (C2HSOH)? (AHvap = 43.3 kJ/m...

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Q: e limiting reactant? En

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Q: ng déscribes the final major product of the reaction of 2-propanone with excess methanol and catalyt...

A: Aldehyde and ketones reacts with alcohol in presence of catalyst HCl.

Q: The reaction for the decomposition of ammonia into its elements is: 2 NH (a) Na (a) +3 Ha ta) [H) = ...

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Q: Gaseous ethane (CH,CH,) reacts with gaseous oxygen gas (0,) to produce gaseous carbon dioxide (CO,) ...

A: Given data, mass of C2H6=0.60 g , molar mass=30 g mol-1 mass of oxygen=0.99 g, molar mass= 32 g mol-...

Q: When the entropy change of the surroundings is negative, the enthalpy change for system O will be ne...

A: A multiple choice question based on chemical thermodynamics that is to be accomplished.

Q: The decomposition of phosphene (COCI,) gas into carbon monoxide (CO) and chlorine (Cl2) gases is ver...

A: Equilibrium constant ( Kp ) is the ratio of partial pressures of products to partial pressures of re...

Q: A sample of solid NH4NO3 was placed in an empty container. It decomposes according to the following ...

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Q: For items 5 and 6: 5. What is the mole ratio of 3NO2 to 2HNO3? 3NO2 + H2O → 2HNO3 + NO 6. What is th...

A: Stoichiometric relation help in finding the relationship between the quantity of reactant and produc...

Q: Nitrogen (N,) gas and hydrogen (H,) gas react to form ammonia (NH,) gas. Suppose you have 5.0 mol of...

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Q: Table 1: Absorbance of Ibuprofen at 221 nm in phosphate buffer (pH 6.8) Concentration of Absorbance ...

A: As per Lambert Beer's law, absorbance is directly proportional to concentration of solution. Mathema...

Q: Illutrate with equation the preparation of alkanes by: a. Wurtz synthesis b. Grignard synthesis

A: Alkanes are saturated hydrocarbons.General formula of alkane is CnH2n+2 Here we have to illustrate a...

Q: Aluminum reacts with iodine in the presence of hot water, to exothermically produce aluminum iodide....

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Q: queous sulfuric acid (H,SO4) reacts with solid sodium hydroxide (NaOH) to produce aqueous sodium sul...

A: Given values-> Weight of H2SO4 = 8.8 gm Weight of NaOH = 3.3 gm  

Q: Using the half-equation method, balance the following redox half-equations in an acidic solution and...

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Q: A chemist measures the amount of nitrogen gas produced during an experiment. She finds that 34.5 g o...

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Q: A mixture of krypton and oxygen gas is expanded from a volume of 31.0L to a volume of 95.0 L, while ...

A: Given :- External pressure Pext = 71.0 atm Initial Volume Vi = 31.0 L Final Volume Vf = 95.0 L

Q: Liquid octane (CH(CH, CH, reacts with gaseous oxygen gas (0, to produce gaseous carbon dioxide (CO, ...

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States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.