(a) Write “true” or “false” for each statement. (a) A mole ofhorses contain a mole of horse legs. (b) A mole of water has amass of 18.0 g. (c) The mass of 1 molecule of water is 18.0 g.(d) A mole of NaCl(s) contains 2 moles of ions.

Q: (a) Does the percent by mass of each element in a compounddepend on the amount of compound? Explain.…

A: a) In a molecule of calcium chloride, there is one calcium atom and two atoms of chlorine. The total…

Q: Ethanol, the alcohol contained in alcoholic beverages, is composed of 52.2% C 13.0% H, and oxygen.…

A:

Q: If the statement is true, write TRUE. If the statement is false, change the underlined word(s).…

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Q: The mole is defined in terms of the carbon-12 atom. Usethe definition to find (a) the mass in grams…

A: The quantity of a substance which consists of the number of carbon atoms in 12 g of pure carbon-12,…

Q: Glycine, an amino acid used by organisms to make proteins,is represented by the following molecular…

A: Glycine is the simplest amino acid present. It is made up of an amine group and one carboxylic group…

Q: Seawater is approximately 4.0% by mass dissolved ions, 85% of which are from NaCl. (a) Find the mass…

A: The concentration of seawater is 4% by mass. This implies that 4g of solute is present in 100 g of…

Q: (a) Determine the mass of sodium metal that contains the same number of moles as 87.2 g of copper…

A: (a) Determine the mass of sodium metal that contains the same number of moles as 87.2 g of copper…

Q: (a) Determine the number of oxygen atoms and hydrogen atoms in1.00 kg of water. (b) Calculate the…

A: (a) Determination of number of oxygen atoms and hydrogen atoms in 1.00 kg of water is as follows;…

Q: A sample of 0.600 mol of a metal M reacts completely with excess fluorine to form 46.8 g of MF2.(a)…

A: 1 mole of M is present in 1 mole of MF2 and 2 mole of F in 1 mole of MF2. The moles of M is 0.600.

Q: A substance is 10% carbon by mass. If the total mass of substance is 25 grams, (a) what is the mass…

A: It is based on the concentration terms. Here we are required to find the mass of carbon present in…

Q: Calculate the number of molecules present in each of the following samples.(a) 0.800 mol acetylene,…

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Q: Calculate the number of moles of: (b)  Mg2+ ions in 8.320 mol of Mg3(PO4)2. (c)  acetate ions,…

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Q: Give the empirical formula of each of the following compounds if a sample contains the following…

A: To find empirical formula: a).  Given: 0.0130 mol= C 0.0390 mol= H 0.0065 mol= O

Q: (b) A compound is composed of elements C, H, and N. A 8.400-mg sample of the unknown compound was…

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Q: What is the molecular formula of each compound? (a) Empirical formula CH₂ (μ=42.08 g/mol) (b)…

A: a) Empirical formula = CH2 The Molecular formula can be calculated by the following formula,…

Q: A 1.30 g sample of titanium chemically combines with chlorine gas to form 5.16 g of titanium…

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Q: 1.Ibuprofen is a compound used in painkillers. When a 2.174 g sample is burned in an excess of…

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Q: (C12H,Cl402, molar mass 322.0 g/mol), is a potent poison. The average lethal dose in humans is…

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Q: Benzene has the molecular formula CcH. A sample of benzene has a mass of 43.95 g. (a) Calculate the…

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Q: What is the molecular formula of each compound?(a) Empirical formula CH (μ=78.11 g/mol)(b)…

A: a) Empirical formula = CH     Given mass = 78.11g/mol     Empirical formula mass = 12 + 1=13g/mol…

Q: Nitrogen dioxide (NO2) is a major component of urban air pollution. For a samplecontaining 4.000 g…

A: Each particular substance holds specific relationship between its molecules and moles depicted using…

Q: A piece of aluminum foil 1.00 cm2 and 0.550-mm thick isallowed to react with bromine to form…

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Q: 1. (a) 5.00g of caffeine is found to contain 2.47g of carbon, 0.26g of hydrogen, 1.44g of nitrogen…

A: Given: The mass of carbon=2.47 g. The mass of hydrogen=0.26 g. The mass of nitrogen=1.44 g. The mass…

Q: Mescaline is a hallucinogen in peyote, a cactus native to the southwestern United States and Mexico.…

A: There are certain plants in nature from which drugs are obtained. These drugs are hallucinogenic in…

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.