Explain the concept of "counting by weighing" using marbles as your example.

Q: Calculate the mass, in grams, of 862 atoms of iron, Fe (1 mol of Fe has a mass of 55.85 g).

A: One mole if any substance have 6.022*10^23 atom/ particles/ion etc thus here knowing the no of moles…

Q: A compound contains 21.6% Na, 33.3% Cl, and 45.1% O. Write the empirical formula and name the…

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Q: Which one has the largest number of particles?  A) .50 mol Ar B) .10 mol Mg C) .75 mol NH3 D)…

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Q: Complete the table. Element Moles Mass Cr 0.00442 Fe 73.5 mg Ti 1.009 x 10-3 Hg 1.78 kg

A: Mole is represented by the symbol mol. It is unit of measurement of substance. Mass is defined as…

Q: Write the empirical formulas of ionic compounds, given thecharges of their component ions?

A: The chemical formula of a compound in which elements are present in the simple whole number molar…

Q: What is the difference between an empirical formula and a molecular formula? Can they ever be the…

A: The empirical and the molecular formulas are both a type of chemical formulas. An empirical formula…

Q: How many ug arsine present in a sample contains 6.2 parts per billion arsine, if the weight of the…

A: Parts per billion (ppb) :-  The number of parts by weight of solute present in billion (109) parts…

Q: You will see similar questions like: A mineral sample is obtained from a region of the country that…

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Q: Which kind of chemical formula provides the most information?

A: The structural kind of chemical formula provides the most information.

Q: A molecular compound is found to consist of 26.0% nitrogen and 74.0% oxygen. If the molecule…

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Q: Explain the problem with the following statement and correct it. “When a chemical equation is…

A: The given statement is to be corrected by explaining the error with it. The given statement is:…

Q: 1) What is the molar mass of Ca(NO3)2? A) 70.0 g/mol B) 134 g/mol C) 148 g/mol D) 164 g/mol E) None…

A: The molar mass of Ca(NO3)2 is to be determined.

Q: What is mass percent composition? Why is it useful?

A: Mass percent composition refers to the mass of the component in 100 g of the solution.

Q: 6. copper (II) sulfite 7. copper (II) sulfide 8. nickel (III) carbonate 9. ammonium bicarbonate- 10.…

A: Chemical formula for :  (6) copper (II) sulfite   (7) copper (II) sulfide  (8) nickel (III)…

Q: Describe how molecular formulas and structural formulas areused to represent the compositions of…

A: Molecular formulas and structural formulas are used to represent the compositions of molecules that…

Q: What are Formula Weights?

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Q: Calculate the mass (in g) of each sample.  3.2x10^22 H2O molecules  5.0x10^25 O3 molecules…

A: The values are given as follows:

Q: A certain organic compound has the formula C9H11O2.  A sample of this compound weighs 85.88 grams.…

A: The formula of the given organic compound is C9H11O2.  Mass of the compound=85.88 grams. The molar…

Q: the atomic weight of magnesium is 24.3 g/mol, calculate how many magnesium atoms does 5g represent?

A: Mass of Mg = 5 g Atomic weight of Mg = 24.3 g/mol

Q: gold (I) bicarbonate manganese (IV) hypochlorite lithium sulfide aluminum iodate bismuth (III)…

A: When two or more atoms combine with each other, they will form molecule and those molecules has…

Q: An essay written by carbon pencil on a paper weighs 0.5 mg. How many carbon atoms present in the…

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Q: mass of potassium iodide

A: Moles of potassium iodide (KI) 0.0950 has three significant figures because zeros at the beginning…

Q: Calculate the mass (in g) of each sample.a. 5.94 * 1020 SO3 moleculesb. 2.8 * 1022 H2O moleculesc. 1…

A: Avogadro's  number gives the number of atoms, molecules or ions in one mole of the substance and it…

Q: 1 mol 197.0 g 1. X 4 = 1 mol 6.022 x1023

A: 1. mole : 1 mole of any substance contains avogadro number (NA) of substances     i.e 1 mol =…

Q: Mass of product…

A: Number of moles is defined as the amount of the substance divided by the molecular weight of the…

Q: Without using a calculator, arrange these samples in order of increasing numbers of carbon atoms:12…

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Q: Which one of the following statements concerning the mole is false? One mole of a substance has the…

A: Since moles = mass / molar mass Hence 1 moles of substance will have different mass compared to…

Q: Part 5-Calculating the molar mass (10 points)- You will need the periodic table for this part of the…

A: 1 mole of substance = 6.022 x 1023 unit (It may be atom or particle or ion).

Q: The formula weight of potassium dichromate (K2Cr2O7) is __________ amu.

A: The molecular formula of the compound is K2Cr2O7

Q: Which one of the following samples is expected to have the largest number of ions? a. 0.150 mol…

A: Ionic compounds dissociate into their constituent ions while Covalent compounds will not dissociate…

Q: What is the molar mass of calcnum chloride hexahydrate! a 75.53 g'mol, b.111.0 gmol c 1170 gmol d.…

A: The answer to the following Question is:

Q: 11. gold (III) acetate 12. barium hydroxide 13. hydrochloric acid 14. calcium bicarbonate 15.…

A: Naming is done by looking at the cation and anion

Q: 1.00 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have…

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Q: chalcone 208.3 g/mol

A: A) mass of acetophenone = ( 1.20mL ) • ( 1.03 gmL-1 ) = 1.236g  B) mass of Benzeldehyde = ( 1.40mL )…

Q: Question attached

A: Mass percentage It is the ratio of mass of an atom to the total mass of the compond. mass…

Q: Chemical formulas can be written as empirical formulas, molecular formulas, or structural formulas.…

A: The solution is given below -

Q: 1. An essay written by carbon pencil on a paper weighs 0.5 mg. How many carbon atoms present in the…

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Q: 4. What is the mass percent composition? Why is it useful?

A: Mass percent of each type of element in a compound is called the mass percent composition of the…

Q: How many hydrogen atoms are in 1.0 G sample of acetic acid, CH3COOH? The molar mass of acetic acid…

A: Mass= 1gm Molar mass=60g/mol

Q: Iron in the earth is in the form of iron ore. Common ores include Fe2O3 (hematite), Fe3O4…

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Q: 0.172 g of Mn was heated in the presence of oxygen to make 0.272 g of MnxOy.  Based on this data,…

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Q: Explain Composition of Compounds?

A: Atomic theory explains the constant composition of chemical compounds. It is also known as Law of…

Q: Determine the number of atoms present in 20.0 g samples of each of the following elements? a. Be…

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Q: An organic compound was found to contain 54.5% C, 9.2% H, and 36.3% O.  a. What is the empirical…

A: Percentage of carbon = 54.5 %          Percentage of H =   9.2 % Percentage of oxygen = 36.3 % Mole…

Q: A certain organic compound has the formula C9H11O3. A sample of this compound weighs 3.4 grams.…

A: The formula of the organic compound is C9H11O3. The molecular mass of the organic compound=9 x 12 +…

Q: How many moles are there in each sample? 55.0 g Ti 16.9 mg Na 7.95 x 10^24 Ne atoms

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…