21.929 Mass empty test tube and stopper Mass test tube, stopper and cyclohexanc Mass of cyclohexane (solvent) G.399 0,06gu Mass of additional unknown in Mixture 2 0.03a TOTAL amount ofunknown in Mixture 2 0.09 4 4. 36°C 3.07°C 2.06°C Mass of unknown in Mixture 1 OC Freeze Point Pure Cyclohexane Freeze Point Mixture 1 Freeze Point Mixture 2 CALCULATIONS: ATr of Mixture 1 OC ATrof Mixture 2 Molar Mass (Mix 1) g/mol Molar Mass (Mix 2) g/mol AVERAGE MOLAR MASS of UNKNOWN g/mol Show Sample Calculations Here:

Q: A molecular compound was analyzed and found to contain 40.00% C, 6.71% H, and the remainder oxygen.…

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Q: How many grams of sodium sulfate, , are present in 4.60 moles of this compound? How many moles of…

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Q: A compound is composed of 76.7 % carbon, 14.0 % hydrogen, and 9.28 % oxygen. Find the empirical…

A: Given is, 76.7 % carbon, 14.0 % hydrogen, and 9.28 % oxygen

Q: How would I Calculate the experimentally determined mass% oxalate and how would I also Determine the…

A: we take any random exapmle: 6H+ + 5(COOH)2 + 2MnO4- ======= 10CO2 + 2Mn2+ + 8H2O

Q: What are the procedures in determining the empirical formula and molecular formula using its percent…

A: The empirical formula is the chemical formula of any compound that represents the proportions of…

Q: 1) How many zinc (Zn) atoms are contained in 5.16 moles of Zn?

A: Mole is described as the amount of a substance which consist of  exactly the Avogadro number of…

Q: Example 14: A sample of a compound of N and O contains 1.52 g of N and 3.47g of O. The molar mass of…

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Q: ) Al

A: Hey, since there are multiple questions posted, we will answer first question. If you want any…

Q: A mystery compound has a molar mass of 28.1 g/mol. How many moles is 98.4 g? Do not put any units in…

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Q: 3.5 mole of NH3 are ____ grams I don’t understand the formula to answer this question

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: Chemistry Vocabulary WORD WALL percent composition the percent, BY MASS, of all elements in a…

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Q: Determine the empirical and molecular formula combination for the compound if the percent…

A: Empirical formula- the formula of compound which represent simplest whole number ratio of elements…

Q: rical for a compound that is made of 52.7% potassium and 47.3% chlorine.

A: Potassium is 52.7%  Chlorine is 47.3% Empirical formula is the simplest ratio of elements in a…

Q: A compound is composed of oxygen and 30.45% by mass nitrogen.  What is the empirical formula?

A: Empirical formula of a compound is the formula which is represented by the simplest ratio of atoms…

Q: DON'T use Ai for answering this

A: In doing the calculations, here are the steps: Step 1: Convert the mass of ammonium carbonate to…

Q: 1. What is the molar mass of the following elements? a) B b) Zn c) He

A: Since, In case of atom, molar mass is nearly equal to two times that of its atomic number. Thus,

Q: 1. What is the molar mass of ethane, C,H?

A: In this question, we want to determine the molar mass of ethane ( C2H6 ) How we can calculate the…

Q: What is the molar mass of a compound that has 7 atoms of an element with molar mass 20.63 and 18…

A: 1 mole = 6.022×1023 (Avogadro's number)  The mass of 1 mole of molecules of a substance is called…

Q: QUESTION 1 Select all answer choices that would result in units of moles. ORT PV PV RT mass + molar…

A: There are many formula to calculate mole . Some of them are 1) PV = nRT Where , P = pressure of gas…

Q: Show your complete solution. Write your answer and solution in a clean sheet of paper 1. Consider a…

A: Since you have posted multiple questions, the answer for first question is given below. Kindly…

Q: What’s mass of 6.75 moles of calcium nitrate?

A: The relationship between moles and mass of the substance is given by,

Q: Find the molar mass of the following compound. Calcium Sulfate

A: Standard data: The atomic mass of calcium = 40.078 u The atomic mass of oxygen =15.999 u The atomic…

Q: Determine the number of atoms in a molecule Calculate molar mass

A: Number of atoms = Number of moles × number of atoms in each molecule × Avogadro's number  For…

Q: A Question 17 Convert 0.1 g of sulfur to moles. Round the molar mass to the nearest whole number.…

A: No. of moles of a substance can be calculated by dividing the mass of the substance with the molar…

Q: Calculate the molar mass of calcium carbonate then find the moles and use Avogadro's Number!

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Q: MOLAR MASS MASS (9) FORMULA NUMBER OF MOLES (g/mol) 2. CHNOS 0.4249

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Q: How many moles are there in 1.806 x 1024 molecules of water? number.

A: Number of molecules of water =1.806 X 1024We need to calculate the moles of water.

Q: Describe how the number of grams of certain elements in a compound can be used to determine an…

A: The use of grams of certain elements in a compound can be used to determine an empirical formula.

Q: A compound was analyzed and found to contain 66.67% carbo, 11.11% hydrogen and 22.22% oxygen. If the…

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Q: Calculate number of moles of a substance having 341gram mass and molar mass 568 gram/ mole

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Q: 1) What will you use to find a mole-to-mole ratio and how will you use a mole-to-mole ratio? 2)…

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Q: Calculate the mass in grams of each of the following samples. (Remember from class that the…

A: Given, a. moles of potassium chromate = 0.251 mol b. moles of lithium perchlorate = 1.51 mol c.…

Q: determine the number of atoms in 20 g of Berilium?

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Q: Can we calculate a chemical formula from a mass percent composition? How?

A: Introduction: Percent composition:  Percent composition is defined as the ratio of mass of each…

Q: How many molecules are in a sample of pure benzocaine, if a sample weighs 550mg?

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Q: Examine the pie graph below. What is the molar mass of compound X? Mass Contributions to 3.0 mol of…

A: In the given pie chart: The total mass of the various elements in the compound X must be calculated…

Q: molecular weight is the summation of Atomic numbers Atomics weight Number of molecules

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Q: Calculate the masses of each elements/ compound contain. 1. 4 moles of water 2. 3 moles of iron 3.…

A: According to the mole concept, the substance which contains the number of particles equal to the…

Q: round molar masses to two digits to the right of the decimal point when possible.

A: As given molar mass of a compound is calculated by  adding up the atomic molar masses of all atoms…

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.