3. An oxide of chromium is made up of 5.20g chromium and 5.60 g oxygen. What is the empirical formula of the oxide? (Note: An oxide of nitrogen contains 63.1% oxygen and has a molar mass of 76.0 g/mol).

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Q: For a 0.222 m aqueous solution of sucrose, C12H22O11, What is the boiling point?  kb = 0.512˚C/m

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A: When air  gets heated up it expands and become less dense than surrounding .   

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Q: A chemist weighs a steel cylinder of compressed oxygen, O2, and finds that it has a mass of 1027.8 g...

A: Molar mass of compound = sum of mass of each element  Mole of compound = mass ÷ molar mass 

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Q: Suggest a specific reaction to identify ammonium ions. Why is this reaction specific

A: A question based on qualitative analysis of cations that is to be accomplished.

Q: Based from the nitrogen test experiment, what is the test for nitrogen?

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Q: From your understanding of "Gas, pressure and volume" analyze how a gas causes a pressure on the ins...

A: Gas is one of the state of matter in which molecules are at large distance from each other. Gases ar...

Q: Question 17 On acidity and basicity of aqueous solutions, the following relationships are valid, exc...

A: 17)  Relationship between pH and concentration of H+ and OH- ions:

Q: HO H. NH2 H. HO, H2N Cephradine Cephalexin

A: R-S nomenclature: R-S nomenclature is used to determine the stereochemistry of chiral carbons of a m...

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A: For a balanced reaction number of atoms of each element must be equal on both sides.   Given :  Mass...

Q: limiting reactant?

A:

Q: Refer to the schematic diagram below, what is compound D? | Conc. H,SO, a-naphthol Conc. HS0, acetic...

A: The answer is as follows:

Q: 1. 2-chlorobutane 2. 1-butyne

A: 1. 2-chorobutane ----> 1-butanol   2. 1- butyne --------> 1- butanol  

Q: 20.0 g of carbon dioxide gas is stored in a cylinder (a malfunctioned fire extinguisher) with a volu...

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Q: Which test can be used to differentiate starch and sucrose? O eliwanoff's Test O Benedict's Test O l...

A: Starch is a polysaccharide ( long sugar molecule chains)  while sucrose is disaccharide which is for...

Q: A. Classify the following molecules as polar or non-polar (write below the chemical formula in the f...

A: Here we have to explain whether the given compound ethy isopropyl ether is polar or nonpolar by usin...

Q: Question 30 Which test can be used to differentiate maltose and sucrose? Benedict's Test Bial's Orci...

A: carbohydrate can be distinguish using various chemical test

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A:

Q: Match the pair of monosaccharides that exhibit the type of isomerism being described per item. Enant...

A: To match the pair of monosaccharides with the isomerism they exhibit.  

Q: Question 5 What are the components of the buffer solution when 0.20 mol H3PO4 is made to react with ...

A:

Q: molecules? Briefly explain your answer in terms of molecular pe molecule. a. Between COz and H20 mol...

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Q: The pH of a solution containing a hydrogen ion concentration of 1 x 10-5 is:  A. 3 and its pOH is 6...

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Q: A juice concentrate was colorimetrically assayed using Nelson's test. One milliliter (1.00 mL) of th...

A: To determine the reducing sugar concentration (mg/mL) in the juice concentration.   

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A: The dissociation process is endothermic at the medium where high temperature and high pressure and H...

Q: How    many    molecules    of    NaOH    are    present    in    200    ml    of    the    20%    (...

A:

Q: 23A 0.20 g sample of primary standard Na2C204 (134 g/mol) needed 37.22 mL of of KMNO4 solution to re...

A:

Q: What are the components of the buffer solution when 0.20 mol H3PO4 is made to react with 0.40 mol of...

A: Here 0.2mol of H3PO4 is made to react with 0.4 mol of NaOH . We have to find phosphate components sp...

Q: 1. Propose a mechanism to account for the formation of 2,3-dimethyl-2-butene from 3,3- dimethyl-2-bu...

A: We have been asked to propose a mechanism for the formation of (a) 2,3-dimethyl-2-butene from 3,3-di...

Q: A juice concentrate was colorimetrically assayed using Nelson's test. One milliliter (1.00 mL) of th...

A: To find the reducing sugar concentration (mg/mL) in the juice concentrate ?  

Q: Which of the given statements are CORRECT for an indicator that ionizes as shown below (Ka=1.0 x 10-...

A:

Q: Fill in the blank with the correct words: Energy is to break a bond and when a bond forms. required ...

A: Bond-breaking is an endothermic process, So energy is required.And when new bonds form or Bond-makin...

Q: Over the years, the thermite reaction has been used for welding railroad rails, in incendiary bombs,...

A: Mass of Fe = 10.1 g  Atomic mass of Fe = 55.845 g/mol  Number of moles of Fe =  10.1 / 55.845  = 0.1...

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A: isotopes are elements which have same atomic number but different mass number. Here we are required ...

Q: II. Draw the lowest energy conformation for each of the following compounds: (a) (Ь) (c) (d) (e)

A:

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A: First of all we have to determine degree of unsaturation. 1 degree of unsaturation means one double ...

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A: Buffer is a solution contains acid or base or a salt which can maintain the concentration of hydroge...

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Q: A 25.0 mL solution of HCl is neutralized with 22.9 mL of 0.240 M Ba(OH)₂. What is the concentration ...

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Q: 3b-i: A compound has molecular formula C22H28N20. Calculate the number of double bond equivalents (D...

A: Given,  Molecular formula of the compound = C22H28N2O  Calculate the number of double bond equivalen...

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Q: The concentration of hydroxide ion in an aqueous solution at 25°C is 3.9 × 10⁻⁴ M. What is the conce...

A: Given :  Temperature = 25 °C  [OH-] = 3.9 x 10-4 M   

Q: uestion 21 What are the components of the buffer solution when 0.20 mol H3PO4 is mixed with 0.30 mol...

A:

Q: Show the calculation required to determine the pH of a solution that has H3O+ concentration of 0.015...

A: pH of solution is defined as negative logarithm of hydrogen ions. 

Q: 1. Write the equilibrium expression and identify the specific equilibrium constant symbol possible, ...

A: In equilibrium expression pure solid and pure liquid do not appear because their activity is taken a...

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.