Lithium metal of mass 20.0 g is dropped into a beaker of water, producing hydrogen gas and an aqueous lithium hydroxide solution. 2 Li (s) + 2 H2O (l) → 2 LiOH (aq) + H2 (g) What volume of hydrogen gas is produced if the temperature is 30 oC and the pressure is 125 kPa?

Q: Molarity is used to measure concentration in chemistry. What are the two units used that make up…

A: -> Molarity is number of moles present in one Litere of solution.                          (or)…

Q: O O The solubility of BaCO3(s) in water at a certain temperature is 3.9 x 10-5 mol/L. Calculate the…

A:

Q: 32. When the reaction of A→ 2 B advances by 0.10 mol the Gibbs energy of the system changes by -6.4…

A:

Q: Convert to particles: 425 g platinum to atoms

A: We're given mass of platinum (Pt) and we've to calculate number of atoms of platinum from it.  Mass…

Q: 17] Show the complete reaction mechanism for the following. Do not draw anything directly reaction…

A:

Q: At a constant temperature, a sample of a gas in a balloon that originally had a volume of 8.0 L. and…

A:

Q: Draw the major product for the following reaction. Convert your answer to the InChl format and enter…

A:

Q: 7. 1. Physical property 2. Chemical property 3. Element 4. Compound 5. Mixture shape by chemical…

A: The fundamental metals and nonmetals are separated from one another on the periodic table by…

Q: Given the two reactions Pb²+ (aq) + 2Cl(aq), 3. PbCl2 (s) 4. AgCl(s) Ag+ (aq) + Cl(aq), K4 =…

A:

Q: The two reaction sequences below cannot lead to the final products. Explain why. H NaⒸ CH3CH₂-Br…

A: We have to tell why the given above two reactions don't give the desired products. Introduction:…

Q: Viktor measures out 2.100 g of the ibuprofen from the bottle and dissolves it in 15.0 mL of ethanol.…

A: Given: Mass of ibuprofen = 2.100 g Volume of ethanol = 15.0 mL Length of tube = 1.0 dm Optical…

Q: How many moles of MgCl2 are present in 45.0 g of MgCl2?

A: Since, Moles is the ratio of mass to the molar mass of that atom or molecules. Thus,

Q: What is the pH of a solution with [H3O+] = 1.73 x 10 - 9 M?

A: The information given is The hydronium concentration, [H3O+] = 1.73 x 10 - 9 M The pH of the…

Q: Identify an unknown compound with the following mass spectrum data: M* at m/z of 106, intensity of…

A: Given, The molecular ion peak(M+) = 106 m/z with intensity = 82 The M+1 peak= 107 m/z with intensity…

Q: Select all that apply. Wrong answers count against you. Which of the following synthetic strategies…

A: Usually, ethers are produced using with Williamson's synthesis. It produces good yield of ethers.…

Q: 3.85 x 10^-6 mol lead (II) ions to number of ions

A: 1 mole of any substance contains 6.022 × 1023 molecules.  This number is called as Avogadro's…

Q: Consider the reaction shown below between hydroxide ions (OH), hypochlorite ions (CIO), and chromium…

A: Oxidation: Increase in positive oxidation state or decrease in negative oxidation state Reduction:…

Q: Question 9 AC 2.5 (1) The halogens can all act as oxidising agents. What is an oxidising agent? (ii)…

A: Oxidising agent, reducing agent ; these are the terms from redox reaction.

Q: For the reaction below at a particular temperature, the concentrations at equilibrium were observed…

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

Q: A dimeric binding protein has a KD1 of 50 nM and a Hill coefficient of 1.4. What is the fraction of…

A: To determine the fraction of the protein that has ligand bound at a given ligand concentration, we…

Q: Ammonia has been studied as an alternative "clean" fuel for internal combustion engines, since its…

A:

Q: Suppose 50.00 mL of 2.0 X 10–6 M T(NO3)3 is added to 50.00 mL of 2.0 X 10–4 M ZIO3. Which of the…

A: The information given is 50.00 mL of 2.0 X 10–6 M T(NO3)3 is added to 50.00 mL of 2.0 X 10–4 M ZIO3…

Q: 2NaHCO3(S) ---> H2O(G) + CO2 (G) + Na2CO3 (s) RELEVANT INFO: 29.0C AND 766.5mmHG MEASURED, 1.11…

A:

Q: The energy required to change two moles of liquid to its vapor is called molar heat of vaporization.…

A: The heat of vapourization is defined as the amount of heat absorbed by the component to change its…

Q: 2NaHCO3 (S) --> H2O (G)+ CO2(G) + NA2CO3(S) What is the volume of gas measured at 29.0C and…

A:

Q: Below is the Lewis structure of the bicarbonate e (HCO₂) ion. :0: H:O:C:0: Count the number of…

A: The shared pairs of electrons present between the bonded atoms are called bond pairs. All valence…

Q: The activation energy for a reaction was calculated to be 241 J/mol, and the frequency factor in…

A: Activation Energy = 241 J/mol Slope of Arrhenius plot = ?

Q: When a water molecule forms a hydrogen bond with another water molecule, which atoms are involved in…

A: Given : water molecules forming hydrogen bonding

Q: A cylindrical specimen of steel having an original diameter of 12.8 mm (0.505 in.) is tensile tested…

A: To calculate the ductility of a tensile specimen in terms of percentage reduction in area, we can…

Q: For the titration of 55.0 ml. of 0.200 M NH, with 0.500 M HCI at 25 °C, determine the relative pH at…

A:

Q: What reagents (i.e., H2O H2SO4 and in that order) are appropriate to carry out the conversion shown?…

A: Identify the best reagents for the above organic conversion.

Q: 맛 Hel 디 몇

A:

Q: Which of the audic proton? . Н 0* -following compounds includes the most H H 1-H ↑ answer H

A: AH  =   A-  +  H+ Greater the stability of conjugate base (A-) higher will be the acidic nature of…

Q: a) b) CH₂ H₂ C111 CH₂ H₂ C/ Br с CHIF CI - H 4 CHIF Br H MICI

A: Enantiomers: Optical isomers which are mirror images of each other. They have opposite configuration…

Q: SN1: Comparison A В HO: HO: НО of Leaving Group: нс Ҷсс нс н с HCC-Br Н,С Н.С. Hcmc-a НС Н.С. H₂CC-F…

A: Unimolecular nucleophilic substitution reaction (SN1): This reaction proceeds in two steps. The…

Q: What mass of solute is present in 417 mL of a 0.160 M magnesium fluoride solution?

A:

Q: A sample of a gas at 3.67 atm pressure and 14°C has a volume of 75.0 mL. The pressure is lowered to…

A:

Q: Hello, Write the balanced net ionic equation for the reaction of Fe3+ and NaF. Explain, in your own…

A: Net ionic equation between Fe3+ and NaF.

Q: Consider the titration of a 15.00 mL sample of 0.25 M HC₂H302 with 0.111 M NaOH. Determine the pH at…

A:

Q: A solution has [OH-]-2,5 x10-7 M. The [H] in this solution is 1.0 M M M OPM none of these

A: Given:  [OH-] = 2.5×10-7  Formula:  Kw = [H+] [OH-]  where Kw = 1.0×10-14  So, [H+] [OH-] =…

Q: H H

A: pKa is around 8.5 , therefore it is slightly basic in nature.

Q: How many grams of Na2SO4 would you need to dissolve in 1.31 L of water in order to create a solution…

A:

Q: A gas occupies 18.7 L at 2.00 atm pressure and 27°C. How many moles of gas are present in the…

A: Given:  Volume of gas occupied, V = 18.7L  Pressure of gas , P = 2.00 atm  Temperature, T = 27°C =…

Q: -1 The molal boiling point elevation constant K₁=0.57 °C-kg-mol for a certain substance X. When 34.…

A: To solve this problem we have to calculate the Boiling Point of pure X

Q: A reaction has a Keq value of 0.19 for the conversion of S→P. If the [S] = 1 mM and the…

A:

Q: The standard reduction potential for Zn2+(aq) + 2e− → Zn(s) is −0.76 V, when the reaction is…

A: Given -> Zn2+(aq) + 2e- ----> Zn(s) E°= -0.76 V

Q: How many unique carbons are present in the structure below

A: Given: structure of molecule  Tip : see differently attached carbon atoms

Q: Ethylene reacts with oxygen gas. When the reaction is balanced, what is the coefficient in front of…

A:

Q: 5. A tiny piece of paper (produced from formerly living plant matter) taken from the Dead Sea…

A:

Q: shown below. Ignore any inorganic byproducts. CH3CO₂H Br

A: Structure of Product of the organic reaction.

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.