of

Q: Please solve both question

A:  We’ll answer the first question since the exact one wasn’t specified. Please submit a new question ...

Q: The largest change in pH for an effective buffer occurs when the base is how many times as concentra...

A: Involved equation:- HA + H2O = H3O+ + A- As we know pH = pKa + log[Base]/[acid]  

Q: help

A: To determine : The length of a day on Earth.  

Q: What is the Charactenshe length of a hydrogen bond m soluhon? a) 0.028 A b) 0. 28 A c) Z.8 Å d) 28 A...

A:

Q: Need answer ASAP

A: The question is based on the concept of precipitation reactions. we have to identify the precipitate...

Q: A scientist measures the standard enthalpy change for the following reaction to be 2885.4 kJ: 6CO,(g...

A: 6CO2 (g)  + 6 H2O (l)  ---> C6H12O6 (s) + 6 O2 (g)  ∆Hrxn  = 2885.4 KJ/mol ∆H°f H2O = ? 

Q: Consider the following carbohydrates: OH OH OH HO HO. HC HO OH HO HO OH CH,OH OH OH III Which of the...

A:

Q: hw help

A: The reaction scheme is generally framed by considering the factors like atom availability and reacti...

Q: Please show all work :

A:  

Q: I need help please

A: Given :- volume of CO2 = 3.2 L  To be calculated :- number of moles of C3H8 required  at STP :-  1 m...

Q: Consider a galvanic electrochemical cell constructed using Cr/Cr** and Zn/Zn2* at 25 °C. The followi...

A:     In this question, we have to find out the correct answer of given problem by the help of the con...

Q: #14 - please chose for the column "change in composition from the drop down menu -- go up, go down, ...

A: Given reaction is : 4NO(g)+6H2O(g)→4NH3(g)+5O2(g) This is a endothermic reaction. According to le -c...

Q: Which of these molecules would be optically active? Explain. 1) 2-chloro-4-ethylhepatane 2) cis-1,2-...

A: The optically active compounds are the compounds which can rotate the plane polarised light. The nec...

Q: hw help #q8

A: Site for an EAS in case of disubstitued benzene is decided as follows: 

Q: Write the reaction responsible for the solution being basic. Spectator ions do not need to be includ...

A: The chemical reaction in which two salts solutions are mixed together and leads to the formation of ...

Q: For the following heterogeneous equilibrium at 1998.7 K: CaO(s) + CO,(9) 2 CaCO3(s) the pressure of ...

A: Given,  Chemical equation: CaO(s) + CO2(g) ----> CaCO3(s)    We need to express the Kp and Kc ter...

Q: One mole of chlorine gas contains molecules of Cl2. O 1.0 35.45 1.2 x 1024 not enough information is...

A: 1 mol molecule means there must present Avogadro number of molecules. 

Q: Please answer #2.

A: To solve this problem we will use combined gas law which is given as P1V1/T1 = P2V2/T2  Where, P1 an...

Q: hw help last

A:

Q: How many grams are in 3.4 moles of C2H5OH molecules? (use molar mass and round answer to the correct...

A: Mass of 3.4 mole of C2H5OH = 156.34 g

Q: #12. For the column, "change in composition" you must chooose from the drop down menu... "go up, go ...

A:

Q: 16

A: Introduction: Benzene shows electrophilic substitution reactions As benzene contains delocalized ele...

Q: 25 HW help

A:

Q: draw an arrow pushing mechanism for this example

A: There are many mechanisms in organic chemistry such as nucleophilic substitution, nucleophilic addit...

Q: A compound of found to contain 14.87% phosphorus and 85.13% chlorine by mass. What is the empirical ...

A: To get the empirical formula we need to consider moles of each elements present. Then calculate the ...

Q: How an unknown acidic water sample could be analyzed in terms of its concentration by acid-base titr...

A: The acid in water given is H2SO4 and the base used for titration is KOH.  

Q: Calculate the pH of a mixture that contains 0.22 M of HCNO and 0.10 M of HC6H5O. The Ka of HCNO is 3...

A: Given : Concentration of HCNO = 0.22 M And concentration of HC6H5O = 0.10 M Ka of HCNO = 3.5 X 10-4 ...

Q: Can someone please help with question 4

A: Given, A→P let the rate  law for this reaction be : r=K[A]n          (i)where,r= rate of reactionK= ...

Q: A 1.00 liter solution contains 0.35 M hypochlorous acid and 0.26 M potassium hypochlorite. If 30.0 m...

A: According to the question, a 1.00 liter solution contains 0.35 M hypochlorous acid and 0.26 M potass...

Q: Write a net ionic equation for the reaction that occurs when solid chromium(II) hydroxide and hydroc...

A: Given : Different - different reactants as Chromium (II) hydroxide and hydrochloric acid (aq)  To fi...

Q: When chlorine reacts with sodium iodide, sodium chloride and iodine are produced. The balanced equat...

A:

Q: #10

A: Final Answer - 0.61 M

Q: Chemists use a number denoted by pH to describe quantitatively the acidity or basicity of solutions....

A: The scale of the pH ranges between 0 to 14. This pH scale indicates the concentration of hydrogen io...

Q: |Calculate the pH of a 18 M NH,Cl(aq) (ammonium chloride salt of ammonia) at 25°C. The base ionizati...

A: The given chemical reaction is: NH4+aq + H2Ol ⇔ NH3aq + H3O+aq The given information is: Conc. of NH...

Q: Methane and hydrogen sulfide react to form carbon disulfide and hydrogen, like this: CH4(g)+2H2S(g)→...

A:

Q: According to the following reaction, how many moles of hydrofluoric acid will be formed upon the c...

A: Given reaction is, SiF4s+2H2Ol→4HFaq+SiO2s To determine the number of moles of HF formed upon the co...

Q: Please explain

A: The electromotive force of a galvanic cell which is formed from a standard reference electrode and a...

Q: How many moles are in 3.2 x 1024 of CO2 molecules? (round answer to the correct number of sig figs)

A: Given : Number of molecules of CO2 = 3.2 X 1024 molecules.  

Q: What is the pressure in atmosphere. Convert 20.0 to pounds per square inch

A:

Q: Question 1.5 Why is it important to wipe the cuvette before every measurement? (a) To make sure that...

A: Cuvette is used in laboratory to put samples in for the spectroscopic analysis. Cuvette allows the l...

Q: #7

A: The given reaction is : H2(g)+CO2(g)⇌H2O(g)+CO(g)

Q: ?nucleophiles اختر واحدة أو أكثر a. CH4 Ob. Br c. H20 d. NH3 e. H2C=CH2 (-)f. OH (+)g. Br h. BH3

A: The electron rich species are termed as nucleophiles. Nucleophiles can be neutral or negatively char...

Q: hw11

A: Ans

Q: 35). Will a precipitate of magnesium fluoride form when 400. mL of 1.5 x 10-3 M MgCl2 are added to 6...

A: Ksp for MgF2 = 6.9 × 10–9 Number of moles of Mg+2 = M*V = 1.5 × 10–3 M * 400. mL = 0.6 mmol Number ...

Q: Consider the reaction: 2H,8(g) + 30,(2)-2H,O(1) + 280,(2) Using standard absolute entropies at 298K,...

A: The given chemical reaction is: 2H2S(g) + 3O2(g) → 2H2O(l) + 2SO2(g) The standard molar entropies at...

Q: Jenny says a large object, like Lake Michigan can contain significant heat energy even if it is at 0...

A:     In this question, we have to find out the correct answer of given problem by the help of the con...

Q: Q-A gas is heated from 263.0 K to 298.0 K and the volume is increased from 24.0 liters to 35.0 liter...

A:

Q: Write the reaction responsible for the solution being basic. Spectator ions do not need to be includ...

A: Applying concept of basic salt.

Q: Which of the following acids (listed with pKa values) and their conjugate base should be used to for...

A: Those solution when resist to change the pH when small amount of acid or base added on it's then thi...

Q: Calculate the wavelength and the frequency of the spectrum if H2 has a peak calculated to have an en...

A:

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".