How many H atoms are present in 8.3 g of H 2 ? O a. 2.5 x 1024 atoms O b.6.02 x 1023 atoms O c. 10.0 x 1024 atoms d. 5.0 x 1024 atoms

Q: what mass of copper (ii) nitrate is prevent in 50.00mL of a 4.55x10-3 M aqueous solution

A:

Q: (SPM10-29] Which equations represent double decomposition reactions that form a precipitate? Na So. ...

A: Given reactions are : I. CuSO4 + Na2CO3 -------> CuCO3 + Na2SO4  II. CuSO4 + Mg(NO3)2 ------->...

Q: 1.10 M Acetic acid 0.900 M Sodium acetate [H30*1 (M) Solution (mL) |(mL) 1 8.00 2.00 8.71e-5M 7.00 3...

A: Here we have to determine [H3O+] concentration in mixing the following volumes of 1.10M acetic acid ...

Q: Create a procedure outline for calculating the activation energy of an iodine clock reaction, an exa...

A: Answer.

Q: Report predicted pKa, observed pKa and percent error from graph please if you could please explain :...

A: To report predicted pKa, observed pKa and percent error from the graph.

Q: Francis A. Santos Which of the following chemical grades are specially manufactured, have exceptiona...

A: Which of the following chemical grades are specially manufactured, have exceptional purity and used ...

Q: Calculate the pH for each of the cases in the titration of 25.0 mL of 0.180 M pyridine, C,H, N(aq) w...

A: Given,  Molarity of C5H5N = 0.180 M  Volume of C5H5N = 25.0 mL  Molarity of HBr = 0.180 M  Base diss...

Q: Determine the concentration of 7.13 g zinc nitrate (MW = 189.4 g/mol) dissolved in 200.0 mL distille...

A: Given, Weight of zinc nitrate = 7.13 g Molecular weight (MW) of zinc nitrate = 189.4 g/mol Volume of...

Q: Calculate the concentration equilibrium constant KC at 298 K for the reaction N2O4 (g) ⇋  2 NO2 (g)...

A:

Q: Question 48 How much distilled water must be added to a 25.00 mL 0.5104 M aqueous H2SO4 solution to ...

A: In case of dilution of any acid or base, the number of moles will remain unchanged i.e, moles or mil...

Q: Calculate the standard entropy change for the following reaction at 25°C. CH,(g) + 2 O2(g)→ CO2(g) +...

A:

Q: When 6 moles of H₂ reacted with 3 moles of N₂ to produce, NH₃, which is the limiting reactant? *

A: Answer: In chemical reaction, limiting reagent is the reactant that exhausted first and decided the ...

Q: Which of the following statements is true? A Liquids can be weighed using a weighing paper. B In wei...

A:

Q: When 17.8 grams of aluminum are reacted with 82 grams of chlorine, determine the theoretical yield (...

A: The balanced equation for the reaction of Aluminum (Al) and Chlorine (Cl2) is ,   2  Al  +   3 Cl2  ...

Q: Computation. Compute for the amount of NaHCO3 that reacted with 9.4 g citric acid. 3 NaHCO3 (MW:84g/...

A: Given, 

Q: The complete orbital notation diagram of an atom is shown. Five squares are shown aligned horizonta...

A: To draw the complete orbital notation diagram of the atom as described.

Q: View Policies Current Attemptin Progress (+)-Citronellal is the main compound responsible for the le...

A:

Q: Which is more acidic CHECH or CH2-DCH2?

A: Given that : We have to identify which of the compound is more acidic :

Q: How many grams of CuCl2 (MW = 134.45 g/mol) is needed to prepare 100.0 mL of 0.2418 M CuCl2?

A:

Q: How much distilled water must be added to a 25.00 mL 0.5104 M aqueous H2SO4 solution to prepare a 0....

A:

Q: Which of the following changes will affect the activation energy of a reaction? 1. Increasing or dec...

A: Activation energy: When the reactant molecules convert into the products, they required the minimum ...

Q: Question 17 The amount of substance formed or consumed at the electrodes is proportional to the quan...

A:

Q: 1.Consider the complete combustion of methane gas, CH4(g): Which of the following BEST describes the...

A: Entropy is defined as measure of randomness or disorder of system.

Q: Which is NOT true about stock solutions? A Must be rarely touched during experiments B Cannot be con...

A: Stock solution is a concentrated solution that is prepared well in advance. It is then used to prepa...

Q: What is the relationship between the rates of the forward and reverse reactions of a reversible reac...

A:

Q: Computation. What is the amount in milligrams of white wax needed to prepare 10 grams of white ointm...

A: This problem will be solved by unitary method. Calculations are done on the following step.

Q: E. F 2.5 1.4 9. 6. 4. Propose a structure for a compound with the following H1 NMR spectra. Match ea...

A: Since we know that in IR spectra carbonyl compound shows peaks around  1700-1725 cm-1...  

Q: For the formation of 1 mol of nitrosyl chloride at a given temperature, AH= -44- NO(g) + 1/2 Cl2(g) ...

A: For any reaction  A -----> B Eaf = x KJ/mol ∆H = y KJ/mol If we reverse the above reaction then a...

Q: Use the following thermochemical data to calculate AGn for the formation of HI at 25°C. H2(g) 2(g) H...

A: The data given is,  

Q: Consider the reaction: 2 CO(g) + O2(g) = 2 CO2(g) What will be the shift in equilibrium if some O2 i...

A: Given chemical Reaction equation :- 2 CO(g) + O2(g) ⇌ 2 CO2(g) Reactants => CO and O2 PProduct =&...

Q: 5. A 7.25x104 M solution of Potassium cyanide (KCN) has a transmittance of 45.2% when measured in a ...

A: Please find your solution below : Beer-Lambert law is a law that gives the relation between the amou...

Q: Aluminium metal reacts with sulphuric acid, H2SO4, to yield aluminium sulphate and hydrogen gas. Cal...

A: Aluminium metal reacts with sulphuric acid, H2SO4, to yield aluminium sulphate and hydrogen gas. The...

Q: Which of the following pairs is correctly matched? A spatula : scoops out solids B crucible tongs : ...

A: Spatula, crucible tongs, beaker and hotplate are tools used in the laboratory.

Q: The average velocity of the atoms emitting a photon at 676 nm was 3184 m/s. What is the contribution...

A: Doppler linewidth is given as: ∆λ=λvcwhere,λ=wavelengthv=average velocityc=speed of light in vacuum

Q: Complete the Lewis structure of the compound shown below and indicate which of the following stateme...

A: Sine you have posted questions with multiple sub-parts, we are entitled to answer the first 3 only. ...

Q: Question 47 How many grams of CuCl2 (MW = 134.45 g/mol) is needed to prepare 100.0 mL of 0.2418 M Cu...

A: The correct option would be:  

Q: Which of the following is the correct sequence of weighing using an analytical balance? I. Press Tar...

A:

Q: Write the equilibrium constant expression for the reaction: 2 SO3(9) = 2 SO2(g) + 02(9). K = [so ] K...

A: Write equilibrium constant expression of the given reaction---

Q: Codeine can treat pain and cough but has a high risk for addiction and dependence. Which of the foll...

A:

Q: Which is true for standard deviation (s) for a sample size (n)? A The greater the n, the smaller the...

A: Standard deviations decreases, with the increase in the sample size.

Q: A compound contains carbon, oxygen, and hydrogen. Analysis of a sample showed that it contained by m...

A: 27) Given: Percent by mass of C = 68.9 % Percent by mass of H = 4.92 %  

Q: Which of the following statements is true? A Liquids can be weighed using a weighing paper. B In wei...

A: Find out the true sentence from given four sentence and explain why it is correct while others are n...

Q: If a reaction performed at 300 K doubles its rate when the temperature is increased to 310 K, what i...

A:

Q: Determine the concentration of 7.13 g zinc nitrate (MW = 189.4 g/mol) dissolved in 200.0 mL distille...

A: The solution is as follows:    

Q: QUESTION 1 What are the standard units of density for a solid | and a liquid

A:

Q: At 400 K, an equilibrium mixture of H2, 12, and HI consists of 0.065 mol H2, 0.079 mol 12, and 0.13 ...

A:

Q: d) If the reaction is carried out at 0°C, what would be the major product? c) The reaction is then c...

A:

Q: For Drug A, the difference between the effective dose 50 and lethal dose 50 is 4mg. For Drug B, the ...

A: Therapeutic index is defined as the difference between the amount (concentration) of the drug that i...

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

A:

Q: A 42.20 gram sample of a hydrate of CoCl, was heated thoroughly in a porcelain crucible, until its w...

A: We can determine the fomula by calculating the number of moles of CoCl2 and water present. 

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.