1) For each of the follow: determine the empirical formula using charges and the criss-cross method, then find the percent composition. SHOW ALL WORK! a) sodium oxide b) sodium hydroxide c) iron (IV) hydroxide

Q: Determine the number of moles present in a 1000 g gold bar. Round off your answer to the nearest…

A: Mass of gold = 1000g We have to determine the no. of moles present in 1000g of gold bar.

Q: Analysis of an unknown hydrocarbon (CHy) revealed that the compound was 81.68% C. The subscript for…

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Q: e empirical formula са

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Q: A compound is found to contain 5.17% hydrogen., 35.9% nitrogen and 58.9 % sodium. Find the empirical…

A: Given data: The mass of Hydrogen=5.17%.=5.17 g. The mass of Nitrogen=35.9%=35.9 g. The mass of…

Q: Problem Solving Directions: Solve the following problems. Write your complete solution. 1. A 60.00 g…

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Q: This is the chemical formula for diethyl ether: (CH,CH,),O. . Calculate the mass percent of hydrogen…

A: Given :-  chemical formula of diethyl ether = (CH3CH2)2O  To calculate :-  mass percent of Hydrogen…

Q: Calculate the molar mass of Ba(ClO,),. Show your work! Show Your Work

A: Molar mass of the compound is the sum of the mass of each element .

Q: My question is how to find the mass of chlorine in agcl after finding the moles of chlorine

A: Given:- How to find the mass of chlorine in agcl after finding the moles of chlorine.

Q: pls solve to the weight of Calcium in mg: giuon.

A: Solution:  We know EDTA can form complex with Ca2+ ion.  So the reaction is : Ca2+ (aq)  + EDTA 2-…

Q: e empirical formula

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Q: An unknown compound had the following percent composition: 58.01% copper and 45.99% sulfur. What is…

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Q: This is the chemical formula for diethyl ether: (CH,CH,),O. Calculate the mass percent of carbon in…

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Q: Calculate the number of N atoms in 0.549 mg of NH4NO2. Answer in scientific notation

A: We have to calculate the number of N atoms in 0.549 mg of NH4NO2.

Q: A reaction between 6.87 g of iron and 13.1 g of chlorine produces an iron-chloride compound. Answer…

A: Given : Mass of iron i.e Fe = 6.87 g And mass of chlorine i.e Cl2 = 13.1 g

Q: Calculate the number of moles in 21.0 g of each of the following: Y Part D Gaz Sa Express your…

A: Part D Given, mass of Ga2S3 = 21.0 g moles of Ga2S3 = ? Note:  molar mass of Ga2S3 = 235.64 g/mol

Q: During the Empirical Formula Lab you extinguished your “L-tube” flame without waiting for the…

A: If the reaction cools down before the L-tube flame goes out, it indicates an incomplete reaction or…

Q: Be sure to show your work. 1. What is the molar mass of CO2?

A: NOTE : Since you've asked multiple questions,we'll solve only first question for you. If you want…

Q: Calculate the molar mass of sodium nitrate? Calculate the mass of NO3- ions present?

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Q: Find the molecular weight or Formula weight.

A: 1. CO = 12+ 16 = 28 2. NaCl = 23+ 35.44 = 58.44 3. SO2 = 32 + (16x2) = 64 4. K2S = (39 x 2) + 32 =…

Q: This is the chemical formula for hexanal: CH, (сH,) сно. Calculate the mass percent of hydrogen in…

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Q: Vhat is the empirical formula fc

A: Y Ba2Cu2O5 is the Empirical formula

Q: A compound is found to conatin 46.59% Phosphours, 10.54% nitrogen, and 42.87% fluorine by weight.…

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Q: Mole computation and percentage composition.

A: For the given problem we have to find out the number of moles, formula unit, mass percentage for the…

Q: work

A: Dear student I have given answer to your question in the image format.

Q: Calculate the mass, in grams, of Avogadro's number of ruthenium atoms. Enter your answer in the…

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Q: Calculate the answer to the following problems. Record the answer with the correct number of sig…

A: We know that  1 mole of any substance contains 6.023 × 1023 molecules of that substance. Thus,on…

Q: [References] Use the References to access important values if needed for this question. According to…

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Q: Calculate the percent by mass of each element of CaCl2?

A: To find out the percentage by mass of each element, first we should find molar mass of given…

Q: H,O, + HgO → H,0 + O, + Hg If I have 4.6 grams of H,O, how many moles of Hg will I produce? Show…

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Q: 1. Suppose that in the experiment of the empirical formula 10% of the metal (Mg) stays unreacted and…

A: Magnesium being a metal reacts with oxygen to form magnesium  oxide.

Q: Using the information from number 4, calculate the empirical and molecular formula for the scenario…

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Q: An oxide of iron is 69.94% iron by mass; the rest is oxygen. Determine the empirical formula of this…

A: Given : Mass percent of iron = 69.94 %  And the compound contains only iron and oxygen. Since mass…

Q: Question: please calculate the mass in grams for 0.75 mol hydrogen sulfide (H2S).

A: Given that :  Moles of H2S = 0.75mol  Molar mass of H2S = (1.008gmol-1×2) + (32.065gmol-1×1) =…

Q: Calculate the mass (g) and moles of the alcohol sample.

A: 2.) Mass can be calculated using volume and Density .  Moles can be calculated using mass and molar…

Q: Use the References to access important values if needed fc An experiment requires that enough PNF2…

A: Given : Mass of Fluorine=19g  Compound given is PNF2 To find: To find the mass of PNF2 required to…

Q: e empirical formula for

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Q: This is the chemical formula for calcium phosphate: Ca,(PO,); Calculate the mass percent of oxygen…

A: Given :-  Chemical formula of Calcium phosphate = Ca3(PO4)2  To calculate :-  Mss percent of Oxygen…

Q: e find the Molar Mass, ple

A: the molar mass of the molecules is calculated by adding the mass of all the atoms multiplied by the…

Q: convert 3 moles of H, to molecules of H,

A: 1 mol = 6.02 x 1023 molecules 1 mol = molar mass

Q: Make a Venn Diagram on empirical and molecular formulas.

A: Empirical formulas are defined by the exact ratio of atoms of different elements in a compound…

Q: A compound is found to contain 30.45 % nitrogen and 69.55 % oxygen by mass. What is the empirical…

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Q: Instructions: 1. Select an ionic compound (has to contain a cation and an anion) with a polyatomic…

A: 1. Let us consider the ionic compound as NaNO3 composed of Na+ and NO3- ions. One molecule of NaNO3…

Q: COlumn s the mass of this

A: Given as, T=30oC Now, T=30+273T=303ok

Q: This is the chemical formula for acetone: (CH,),CO. Calculate the mass percent of hydrogen in…

A: The mass percent of an element is given as follows; Mass percent=mass of elementMass of compound×100

Q: Need help determining the number of moles in the following problem

A: Given the mass of Ag(silver) =45.2 gramwe are asked to calculate the number of moles of Ag(silver)…

Q: Empirical Formula of a Hydrate Calculation Sheet (Data Table Calculations): (Show how you (h)…

A: Molar mass of H2O is 18 g/mol

Q: Calculate the molar mass of each compound given below.

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Q: Question 1 A hydrocarbon icompound that contains only carbon and hydrogen) contains 85.63 % carbon…

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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.