5. What is the molecular formula for a compound if the empirical formula is CH₂O and the molecular mass is 90 grams?

Q: The standard curve was made by spectrophotographic analysis of equilibrated iron(III) thiocyanate…

A: Here  we are required to find the Fe3+ concentration of the unknown solution.

Q: A 5.200-g sample of quinone, C6H4O2, is burned in a bomb calorimeter (heat capacity = 7.854 kJ/°C).…

A: Given :-  Mass of quinone, C6H4O2 = m = 5.200 g  Mass of water = mwater = 2500 g  Initial…

Q: ) The combustion of 0.1599 g benzoic acid increases the temperature of a bomb calorimeter by 2.55°C.…

A: Here we have to determine the heat capacity of bomb calorimeter if 0.1599 g of benzoic  acid on…

Q: View Policies Current Attempt in Progress Select the equations that apply to the following…

A: Precipitation reaction : is that reaction in which two aqueous reactants react with each other and…

Q: In a Reduction of a Ketone experiment, if you don’t quench your reaction completely you will obtain…

A: Quenching means to introduce a substance in the reaction mixture that combines with unused reactants…

Q: Why do we use the kw from this equation 2H2O(l) ⇄⇄H3O+(aq) + OH-(aq) to find the OH- of NaOH,…

A: To calculate the pH we need concentration of H3O+ ions as formula of pH is :  pH = - log[H3O+]

Q: Label the graph with the correct axes for a standard curve used in a spectrophotometry experiment. y…

A: In spectrophotometry experiments, the light reflected by a sample solution of known concentration is…

Q: A solution of HCIO, was standardized by dissolving 0.4073 g of primary-standard-grade HgO in a…

A:

Q: Draw the reaction coordinate corresponding to the mechanism below. (The first step is rate…

A: This is an example of electrophilic aromatic substitution reaction. It involves two steps.  In the…

Q: 1. How many moles of air are there in a flask with a volume of 125 mL if the pressure is 745 mm Hg…

A:

Q: 2)Boyle's Law D' states that for a certain gas in a container we have P • V = 375 where P represents…

A: Given the Boyle's law relation is: P*V = 375 where pressure, P is in pressure in mm Hg, and  volume,…

Q: What is the IUPAC name for this compound? Н С CH

A:

Q: For the following equilibria, use Le Chatelier's principle to predict the direction of the reaction…

A: Le Chatelier's principle :- It states that when a system at equilibrium is subjected to a change in…

Q: Which of the following is incorrect about the molecule shown below? CH3CH=CH-CH=CH₂ it belongs to…

A:

Q: 14.55 mL of a 0.2506 M solution of barium hydroxide are required to neutralize 10.00 mL of a nitric…

A:

Q: 4 Exp. No. 1 2 3 Mass of Volume of Volume of beaker and liquid Acetic acid Water N Om Mass of Alka…

A: NaHCO3 + CH3COOH = CH3COONa + H2O +CO2    Trial 1: Mass of…

Q: The concentration of hydroxide ion in an aqueous solution at 25°C is 4.8 × 10⁻⁴ M. What is the…

A: Answer is given below

Q: Which of the following is not amphoteric? HCO3 NH4+ H₂O H₂PO4 HS

A: Amphoteric : These are those substances which acts as both acid and base. According to Bronsted…

Q: d Reduction (FADH₂) R' + FADH ₂

A:

Q: What is the molar mass of MgSO4 ● 7 H2O ? H=1.01 O = 16.00 Mg = 24.31 S=32.07

A: Given, molar mass of MgSO4 ● 7 H2O  = ? Note: The molar mass of different atoms are, H = 1.01 g/mol…

Q: He adds powdered iron to a 300.mL copper(II) sulfate sample from the plant until no more copper…

A: Given :-  Mass of CuSO4 = 104 mg  Volume of CuSO4 solution = 300 mL  To calculate :-  Concentration…

Q: released energy of 1 O Y Submit Part B The energy diagram shown represents the chemical reaction…

A: Activation energy is the minimum amount of energy required by the reactant to get converted into the…

Q: A student ran the following reaction in the laboratory at 290 K: 2NO(g)+Br2 (g) 2NOBr (g) When she…

A: Kc is equilibrium constant and it is equal to concentration of product divide by concentration of…

Q: 335 mL of a 0.47 M hydroiodic acid solution is added to 388 mL of a 0.36 M perchloric acid solution.…

A: PH = -log[H+] PH + POH =14

Q: U НО. Please select 4 options. U What are the functional groups present in the biomolecule which is…

A:

Q: Oxygen can be converted into ozone by the action of lightning or electric sparks: 302(g) +203(g) For…

A: Note: As you asked multiple questions in a single question. So according to guidelines here we solve…

Q: The reaction of hydrogen chloride (g) with oxygen (g) to form water (g) and chlorine(g) proceeds as…

A:

Q: QUESTION 4 A 1.50-g sample of Na2SxOs contains 6.68 x 1021 sodium ions. Determine the value of x.…

A: Here we are required to find the value of x Na2SxO6.

Q: Study the following phase diagram of Substance X. pressure (atm) 40 20- 0. solid 100 liquid 200 gas…

A: We can determine the state and change by plotting the given points for temperature and pressure on…

Q: Which is NOT a variable in the Beer-Lambert law? the absorbance of the sample the path length…

A: Answer: Beer-Lambert law gives us a mathematical expression to find out the unknown concentration…

Q: Consider the reaction: SO2 (g) + 1/2O2 (g) SO3 (g) Write the equilibrium constant for this…

A: K is the ratio of the equilibrium concentrations of product over equilibrium concentrations of…

Q: 5. Write a flow chart to show how you could separate the following pairs of compounds by using…

A: We have to separate the given compounds using acid-base extraction.

Q: Macmillan Learning Write a Lewis structure for the following condensed structures. Be sure to draw…

A: Lewis electron dot structures, are diagrams that show the bonding between atoms of a molecule, as…

Q: In the laboratory a student uses a "coffee cup" calorimeter to determine the specific heat of a…

A: When titanium metal at high temperature is dropped in water at lower temperature, titanium will lose…

Q: Given the following thermochemical equations: H2 (g) + F2 (g) → 2HF (g) ΔH = -537 kJ C (s) + 2F2 (g)…

A: we have to calculate ΔH for the reaction  C2H4 (g) + 6F2 (g) → 2CF4 (g) + 4HF (g)

Q: how did you find evidence for identity

A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…

Q: Please explain properly. Q16. Ibuprofen, an example of an NSAID, is the active ingredient in several…

A: iron-catalyzed Suzuki-miyaura coupling can be used to produce S-ibuprofen.

Q: 5) A pair of students fractionally distilled a 1:1 mixture of hexane and heptane while another pair…

A: This question is based on separation of liquids present in a mixture. Substance having lower boiling…

Q: For the reaction N₂O4 (9) 2NO₂ (g), the value of K at 25°C is 7.19 x 10-3 ▼ Part A Calculate [N₂04]…

A: Given  K= 7.19 x 10 —3

Q: What are the oxidation numbers of Sr(BrO3)2 Sr: Br O

A: The compound given is Sr(BrO3)2, strontium bromate.

Q: 5.200-g sample of quinone, C6H4O2, is burned in a bomb calorimeter (heat capacity = 7.854 kJ/°C).…

A: Here we are required to find the heat of Combustion per mol of quinone.

Q: An analgesic drug, acetaminophen (MM = 151.16), was synthesized in the laboratory by reacting 3.25 g…

A:

Q: A 5.00-L tank contains helium gas at 1.50 atm. What is the pressure of the gas in mmHg?     1140…

A: Answer:- This question is answered by using the simple concept of dimensional analysis which…

Q: What is the IUPAC name for this compound? CH3 CH=CH2

A: 1. Select the principle carbon chain 2. Numbering 3. Naming (prefix + word root + suffix)

Q: How many moles of Na+ are present in 343 mL of a 1.27 M solution of Na2SO4?

A: Moles = molarity × volume (L) Number of moles of Na2SO4 = 1.27 M × 0.343 L = 0.43561 mole

Q: eq At 298K, the equilibrium constant for the following reaction is 1.70x10-²: H₂SO3(aq) + H₂O0H30+…

A:

Q: can you also do the other 3 equations

A: In this question, we have to solve the remaining 3 parts in question no. 3.

Q: could you space it out better with better labels?

A: In this question, we have to provide clearly written solution of the preceding question.

Q: Consider the reaction: 2S(s)+302(g)2SO3(g) Write the equilibrium constant for this reaction in terms…

A:

Q: Titanium metal is obtained from the mineral rutile, TiO₂. The process requires multiple steps, as…

A: A, B, C ) Mole ratio cab be calculated using the given balanced reactions .  D.) First we need to…

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.