dolomite is mineral which is used in many industries calculate the percent composition by mass of magnesium CaMg(CO3)2

Q: Be sure to answer all parts. Industrially, vanadium metal, which is used in steel alloys, can be obt...

A: First, calculate the moles for both reactants and then use the mol to mol ratio to find out the mole...

Q: a 232.8mL sample of 2.453 M AgNO3 (aq) was allowed to react with an excess of Na2S(aq). how many mol...

A:

Q: What kind of solvent ingredients is usually used in the concentrations of 4-10 percent in skin care ...

A: Some chemical are used in skin care product ;some of their function is to soften the skin cell and l...

Q: Select the single best answer. Which of the following has more atoms: 3.13 g of hydrogen atoms or 17...

A:

Q: In general, native (folded) proteins are in equilibrium with denatured (unfolded) forms: Protein(fol...

A:

Q: What is the percentage of procaine HCI which will yield an isotonic solution with blood plasma? FD1%...

A: Applying for general formula           0.52-a/b

Q: Priestley prepared oxygen by heating mercury(II) oxide. From the data given below estimate the tempe...

A: Goven-> ∆H°=90.83 KJ =90830 J  S°(Hg) = 76.02 J/mole.K S°(HgO) = 70.29J/mole .K S°(O2) = 205.0 J/...

Q: 4. What weight (in grams) of lactose (C12H22011 , MW= 342 g/mole) is required to prepare each of the...

A: Note: As per company policy we are supposed to attempt first three subparts only. Please repost othe...

Q: Complete the table below by deciding whether a precipitate forms when aqueous solutions A and B are ...

A:

Q: heat flows out of the bath and into the flask. -1 ·K Calculate the new temperature of the water bath...

A: Mass = 4.60 kg

Q: Metals lose electrons under certain conditions to attain a noble gas electron configuration. How ma...

A: Given -  Na  

Q: alculate the mass of excess reagent remaining at the end of the reaction in which 90.0 g of SO2 are ...

A:

Q: Name five (5) monosubstituted benzenes that serve as parent compounds in disubstituted or polysubsti...

A: 1. Monosubstituted benzenes

Q: What are the products of the following reaction? cat. H,SO CH CH OH - O* = 180 %3D + H20* o'CH-CH, A...

A:

Q: What is the role of cation during ion-dipole interactions? A.  it distorts the electron distributio...

A: Ion dipole interaction: It is defined as the interaction between ion and a molecule with permanent d...

Q: Explain how the following DEPT graph explain the presence of methyl propionate?

A: The structure of an unknown molecule can be determined by analyzing its corresponding proton NMR, 13...

Q: 5. Magnesium hydroxide (Mg(OH)2) has a pKsp value of 11.25. In a solution at pH 10, what is the maxi...

A: Given,  pKsp of Mg(OH)2 = 11.25  pH = 10  What is the maximum Mg2+ concentration in µmol/L = ?  What...

Q: Molarity : (The molar concentration of a solution of a solute species ) is the number of moles of th...

A: We have to tell whether the statement is true or false.

Q: H2C- (CH2)10CH3 NaOH HC- -(CH2),CH=CH(CH2),CH3 H2Cㅡㅡ (CH2)16 CH3 ㅇ

A: Reaction of tri ester compounds with NaOH

Q: Click in the answer box to activate the palette. Determine the empirical formula of a compound havin...

A: Element % K 24.74 Mn 34.76 O 40.50    

Q: Given the thermochemical equation 2502(9) +O2(9) 2S03(g). AH pxn= -198 kJ/mol, how much heat is evol...

A: Here to calculate total heat evolved in reaction.

Q: Which of the following occurs when products are added to a chemical reaction in solution or the gas ...

A: -> when reactant or product added then it follow Le-chatelier principle.    

Q: A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains 3....

A: The mass of water in the water bath is = 3.30 kg The initial temperature of the water bath is = 31.8...

Q: 12.45 What is osmosis? What is a semipermeable membrane?

A:   Colligative properties:  The properties which are based on number of solute particles but not on t...

Q: Enter your answer in the provided box. When coal is burned, the sulfur present in coal is converted ...

A: Molar mass of S = 32 g/mol Moles of S = mass / molar mass = 2950g/(32g/mol) = 92.1875 mol The molar ...

Q: Which of the following has more atoms: 3.55 g ef lithium atoms or 19.1 g of nickel atoms?

A: Mass of lithium = 3.58 g Mass of nickel = 19.1 g

Q: Calculate the change in pH that results from adding 0.160 mol NaNO2 to 1.00 L of

A: Ka = 7.2 ×10-4  pKa = -log(Ka)  = -log(7.2×10-4) = 3.14 initially, weak acid HNO2 is present  So,  p...

Q: Calculation of Phosphate Buffer Solution using Henderson-Hasselbach equation

A: Henderson-Hasselbach equation is given as:                                    pH = pKa + log [Conjug...

Q: 1. How many molecules of oxygen are in 50.0 g of oxygen?

A:

Q: tow much heat (kJ) is evolved when 4.50 g of Fe203 is reacted with excess carbon monoxide using e203...

A: Fe2O3  (s) + 3CO (g)----> 2Fe(s) + 3CO2(g) Mass of Fe2O3 = 4.50 g ∆Horxn = -24.8 kJ/mol  

Q: Enter the number of electrons in each energy level (shell) for each of the elements. If the energy l...

A: The no of electrons in each element equals the atomic no of that element.

Q: Q3/ A/ What is the concentration and density of a solution in mol/L when 80 g of calcium carbonate, ...

A:

Q: 1. Aluminum metal (Al) and hydrogen chloride (HCI) react to form aluminum chloride (AICI3) and hydro...

A: Given,  Al and HCl react to form AlCl3 and H2 gas , then  A. What is the balanced reaction = ? B. Ho...

Q: 2. How would you carry out each of the following syntheses? Each may require more than one step.

A: Please see the attachment

Q: 9- Calculate the molar concentration of HNO3 (63.0 g/mol) in a solution that has a specific gravity ...

A: Molarity is a concentration term for a solution. The molarity of a given solution is defined as the ...

Q: A chemist determines by measurements that 0.035 moles of iodine solid participate in a chemical reac...

A: Given moles = 0.035 mol

Q: Pentaborane BgHg(s) burns vigorously in 02 to give B203(s) and H201). Calculate AHrxn for the combus...

A:

Q: 1. For each of the following compounds, give a name or draw a structure, as appropriate. trans-4-phe...

A: IUPAC rules for naming an organic compound: 1. Select the longest possible continuous carbon chain a...

Q: Which of the following processes is exothermic, given the following: N2(9) + 202(9) - N204) AH"= 9.6...

A: Both the given reaction are endothermic  reaction... N2 (g) + 2O2 (g) - - > N2O4(l)  Enthalpy of ...

Q: Draw the mjor product of both question with mechanism asap

A: Given structure of reactants. 

Q: the use of an indicator to determine a concentration using titration as good as using a pH meter?  W...

A: Principle of pH meter  - it is scientific  instruments  which measure  hydrogen  ion activity  in so...

Q: 1. Fill in the blanks with the MAJOR organic product in the following electrophilic aromatic substit...

A: Since you have posted multiple subpart questions, the answer for first three subpart question is giv...

Q: BASES: Base is one of the four classification of compounds. (Sentence 1: Bases will turn red litmus ...

A: Bases-  Any substance which contains OH ion or donate the lone pair of electron. 

Q: 1) NABH,, ELOH 2) H°, H,O

A:

Q: State the assumptions for the following expressions to apply: dH = dq Group of answer options Con...

A:   Enthalpy, H  H = U + PV. The enthalpy per unit mass is the specific enthalpy, h = u + pv. It is a ...

Q: Part A As a technician in a large pharmaceutical research firm, you need to produce 100. mL of 1.00 ...

A:

Q: A chemist measures the amount of chlorine gas produced during an experiment. She finds that 1.35 g o...

A: Calculating number of moles:

Q: Activity 2 HEATING CURVE OF ETHANOL E BOILING F GAS AV LIQUID B MELTINGC -115-- SOLID TIME T'E'N°A Q...

A:  

Q: Enter your answer in the provided box. Calculate the molar mass of a compound if 0.281 mole of it ha...

A:

Q: When (S)-2-bromopropanoic acid [(S)-CH;CHBFCO,H] reacts with concentrated sodium hydroxide, the prod...

A: When an electron-donating neighboring group is present, the rate of SN2 reaction increases and the c...

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.