Q: rgahic compound has a gram molecular weight of 372 g/mol, and its composition is 38.6% carbon, 9.76%…

A:

Q: The “lead” in lead pencils is actually almost pure carbon and the mass of a period mark made by a…

A: Answer = 5.02 x 10 19

Q: Assume that the molar mass of A is 82.93 grams per mole and the molar mass of E is 24.61 grams per…

A: Atoms are the smallest unit of the matter, anything which occupies space and has mass is known as…

Q: The chemical formula of trinitrotoluene (TNT) is C7H5N3O6. What is the molecular mass of TNT?…

A: We have to find the molecular mass of trinitrotoluene (TNT) is C7H5N3O6. Atomic mass of Carbon =…

Q: A beaker contains 48.948.9 mL of carbon tetrachloride (CCl4CCl4, density is 1.591.59 g/mL).…

A: Volume of carbon tetrachloride = 48.9 mL  Density = 1.59 g/mL  Density = mass ÷ volume

Q: Para-cresol, a substance used as a disinfectant and in the manufacture of several herbicides, is a…

A: Para cresol is used to disinfectant  severel Herbicide. It is made with C,H,O.

Q: Calculate the number of magnesium atoms in a 130.0 g sample of forsterite (Mg₂SiO4). Be sure your…

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Q: Convert 1.59 x 1022 molecules/formula units of X5Z4 into grams of the same compound. (Assume that…

A: The given data contains, mass of X5Z4=1.59×1022molecules/formula molar mass =(5×54.94 g/mol)+(4×8.72…

Q: An alloy contains 10.8 % titanium by mass and has a density of 13.98 g/cm3. Titanium-49 has an…

A: Number of atoms = 8,926,980,280,926,177,000,000 atoms. Avogadro’s constant = 6.023 × 1023 atoms.…

Q: will

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Q: A 45.0-mg sample of boron reacts with oxygen to form 145 mg of the compound boron oxide. What is…

A: Empirical formula is the basic simple ratio formula of a molecule after finding the moles of that…

Q: A sample of a compound has a mass of 42.66 g with 1.06 x 10-1 mol. What is the molecular mass of the…

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Q: Maggie filtered out a sample of copper (II) chloride, CuCl2 from a local pond, and found its mass to…

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Q: A newly found compound was discovered to contain 4 iron atoms. If the molar mass of this compound is…

A:

Q: A certain chemical substance has the following percent composition by mass. Element Mass Percent…

A: An empirical formula is depicted by the simplest whole number ratio of the various atoms present in…

Q: An analytical chemist measures the amount of Elements E, and E, in four samples of an unknown…

A: A pure substance has a definite chemical composition. A pure substance can be an element or a…

Q: Determine the empirical formula of a compound containing 47.37 grams of carbon, 10.59 grams of…

A: The molecular formula represents the exact number of each type of atoms in a molecule whereas the…

Q: 42.161 * 1223 molecules of salt + 18.066 × 1023 molecules of sugar

A: 42.161 * 1223 molecules of salt + 18.066 × 1023 molecules of sugar  first we will convert molecules…

Q: B. TRUE OR FALSE: Read each statement carefully. Write TRUE if the statement is correct and FALSE if…

A: Percentage composition gives a brief ideas about each elemental composition as follows.

Q: How many lithium iodide formula units, Lil, have a mass equal to 4.24 g? 1.91 x 1022 formula units…

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

Q: A student begins this experiment with 3.5251 g of mixture. After sublimating the NH4Cl, the student…

A: The exact value that the student obtains is :

Q: The composition of a compound was found to be 66.7% C, 25.9% N and 7.41% H by mass? What is the…

A: Empirical formula represnts number of atoms of various elements present in a molecule in simple…

Q: Calculate the number of moles in each sample. 74.9 g HCCl3 Express your answer with the…

A: Given samples,    74.9 g HCCl3    10.7 g C6H12O6    28.4 kg C2H4    22.6 g of dinitrogen monoxide

Q: A74.12 g sample of a hydrocarbon (CH) has a mass of carbon that is equal to 62.90 g. Given this…

A: To find out the empirical formula, first we need to find out the moles of C and H. Round off that…

Q: Determine the empirical formula of a compound containing 47.37 grams of carbon, 10.59 grams of…

A:

Q: A 1.58 mole sample of a pure unknown substance has a density of 1.87 g/cm3. If the sample occupies a…

A: Given,Density = 1.87 g/cm3Volume = 188 cm3Mole = 1.58 mole

Q: 49.410% potassium, sulfur, and 30.32% oxygen are found to be in a sample found in an unlabeled…

A: The empirical formula of a compound does not give the definite proportions of the element in a…

Q: A 1.125-gram piece of magnesium was burned in the presence of oxygen, forming 1.866-grams of the…

A: Given : Mass of magnesium burned = 1.125 g And mass of magnesium oxide formed = 1.866 g

Q: Convert 1.43 x 10^23 molecules/formula units of X5Z3 into grams of the same compound. (Assume that…

A:

Q: Be sure to answer all parts. Pheromones are a special type of compound secreted by the females of…

A: For this question, first calculate number of moles for pheromone and then convert that moles in…

Q: Determine the mass of the product from the following data.    Mass Aluminum Foil (g)      6.3284…

A: Given data,Mass of filter paper+product=86.2751gMass of filter paper=0.2489g

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.